((a)) ** Value based on use under which property qualifies**

((1)) ** General rule** If—

((A)) the decedent was (at the time of his death) a citizen or resident of the United States, and

((B)) the executor elects the application of this section and files the agreement referred to in subsection (d)(2),

((2)) ** Limitation on aggregate reduction in fair market value** The aggregate decrease in the value of qualified real property taken into account for purposes of this chapter which results from the application of paragraph (1) with respect to any decedent shall not exceed $750,000.

((3)) ** Inflation adjustment** In the case of estates of decedents dying in a calendar year after 1998, the $750,000 amount contained in paragraph (2) shall be increased by an amount equal to—

((A)) $750,000, multiplied by

((B)) the cost-of-living adjustment determined under section 1(f)(3) for such calendar year by substituting “calendar year 1997” for “calendar year 2016” in subparagraph (A)(ii) thereof.

((b)) ** Qualified real property**

((1)) ** In general** For purposes of this section, the term “qualified real property” means real property located in the United States which was acquired from or passed from the decedent to a qualified heir of the decedent and which, on the date of the decedent’s death, was being used for a qualified use by the decedent or a member of the decedent’s family, but only if—

((A)) 50 percent or more of the adjusted value of the gross estate consists of the adjusted value of real or personal property which—

((i)) on the date of the decedent’s death, was being used for a qualified use by the decedent or a member of the decedent’s family, and

((ii)) was acquired from or passed from the decedent to a qualified heir of the decedent.

((B)) 25 percent or more of the adjusted value of the gross estate consists of the adjusted value of real property which meets the requirements of subparagraphs (A)(ii) and (C),

((C)) during the 8-year period ending on the date of the decedent’s death there have been periods aggregating 5 years or more during which—

((i)) such real property was owned by the decedent or a member of the decedent’s family and used for a qualified use by the decedent or a member of the decedent’s family, and

((ii)) there was material participation by the decedent or a member of the decedent’s family in the operation of the farm or other business, and

((D)) such real property is designated in the agreement referred to in subsection (d)(2).

((2)) ** Qualified use** For purposes of this section, the term “qualified use” means the devotion of the property to any of the following:

((A)) use as a farm for farming purposes, or

((B)) use in a trade or business other than the trade or business of farming.

((3)) ** Adjusted value** For purposes of paragraph (1), the term “adjusted value” means—

((A)) in the case of the gross estate, the value of the gross estate for purposes of this chapter (determined without regard to this section), reduced by any amounts allowable as a deduction under paragraph (4) of section 2053(a), or

((B)) in the case of any real or personal property, the value of such property for purposes of this chapter (determined without regard to this section), reduced by any amounts allowable as a deduction in respect of such property under paragraph (4) of section 2053(a).

((4)) ** Decedents who are retired or disabled**

((A)) ** In general** If, on the date of the decedent’s death, the requirements of paragraph (1)(C)(ii) with respect to the decedent for any property are not met, and the decedent—

((i)) was receiving old-age benefits under title II of the Social Security Act for a continuous period ending on such date, or

((ii)) was disabled for a continuous period ending on such date,

((B)) ** Disabled defined** For purposes of subparagraph (A), an individual shall be disabled if such individual has a mental or physical impairment which renders him unable to materially participate in the operation of the farm or other business.

((C)) ** Coordination with recapture** For purposes of subsection (c)(6)(B)(i), if the requirements of paragraph (1)(C)(ii) are met with respect to any decedent by reason of subparagraph (A), the period ending on the date on which the continuous period taken into account under subparagraph (A) began shall be treated as the period immediately before the decedent’s death.

((5)) ** Special rules for surviving spouses**

((A)) ** In general** If property is qualified real property with respect to a decedent (hereinafter in this paragraph referred to as the “first decedent”) and such property was acquired from or passed from the first decedent to the surviving spouse of the first decedent, for purposes of applying this subsection and subsection (c) in the case of the estate of such surviving spouse, active management of the farm or other business by the surviving spouse shall be treated as material participation by such surviving spouse in the operation of such farm or business.

((B)) ** Special rule** For the purposes of subparagraph (A), the determination of whether property is qualified real property with respect to the first decedent shall be made without regard to subparagraph (D) of paragraph (1) and without regard to whether an election under this section was made.

((C)) ** Coordination with paragraph (4)** In any case in which to do so will enable the requirements of paragraph (1)(C)(ii) to be met with respect to the surviving spouse, this subsection and subsection (c) shall be applied by taking into account any application of paragraph (4).

((c)) ** Tax treatment of dispositions and failures to use for qualified use**

((1)) ** Imposition of additional estate tax** If, within 10 years after the decedent’s death and before the death of the qualified heir—

((A)) the qualified heir disposes of any interest in qualified real property (other than by a disposition to a member of his family), or

((B)) the qualified heir ceases to use for the qualified use the qualified real property which was acquired (or passed) from the decedent,

((2)) ** Amount of additional tax**

((A)) ** In general** The amount of the additional tax imposed by paragraph (1) with respect to any interest shall be the amount equal to the lesser of—

((i)) the adjusted tax difference attributable to such interest, or

((ii)) the excess of the amount realized with respect to the interest (or, in any case other than a sale or exchange at arm’s length, the fair market value of the interest) over the value of the interest determined under subsection (a).

((B)) ** Adjusted tax difference attributable to interest** For purposes of subparagraph (A), the adjusted tax difference attributable to an interest is the amount which bears the same ratio to the adjusted tax difference with respect to the estate (determined under subparagraph (C)) as—

((i)) the excess of the value of such interest for purposes of this chapter (determined without regard to subsection (a)) over the value of such interest determined under subsection (a), bears to

((ii)) a similar excess determined for all qualified real property.

((C)) ** Adjusted tax difference with respect to the estate** For purposes of subparagraph (B), the term “adjusted tax difference with respect to the estate” means the excess of what would have been the estate tax liability but for subsection (a) over the estate tax liability. For purposes of this subparagraph, the term “estate tax liability” means the tax imposed by section 2001 reduced by the credits allowable against such tax.

((D)) ** Partial dispositions** For purposes of this paragraph, where the qualified heir disposes of a portion of the interest acquired by (or passing to) such heir (or a predecessor qualified heir) or there is a cessation of use of such a portion—

((i)) the value determined under subsection (a) taken into account under subparagraph (A)(ii) with respect to such portion shall be its pro rata share of such value of such interest, and

((ii)) the adjusted tax difference attributable to the interest taken into account with respect to the transaction involving the second or any succeeding portion shall be reduced by the amount of the tax imposed by this subsection with respect to all prior transactions involving portions of such interest.

((E)) ** Special rule for disposition of timber** In the case of qualified woodland to which an election under subsection (e)(13)(A) applies, if the qualified heir disposes of (or severs) any standing timber on such qualified woodland—

((i)) such disposition (or severance) shall be treated as a disposition of a portion of the interest of the qualified heir in such property, and

((ii)) the amount of the additional tax imposed by paragraph (1) with respect to such disposition shall be an amount equal to the lesser of—

((I)) the amount realized on such disposition (or, in any case other than a sale or exchange at arm’s length, the fair market value of the portion of the interest disposed or severed), or

((II)) the amount of additional tax determined under this paragraph (without regard to this subparagraph) if the entire interest of the qualified heir in the qualified woodland had been disposed of, less the sum of the amount of the additional tax imposed with respect to all prior transactions involving such woodland to which this subparagraph applied.

((3)) ** Only 1 additional tax imposed with respect to any 1 portion** In the case of an interest acquired from (or passing from) any decedent, if subparagraph (A) or (B) of paragraph (1) applies to any portion of an interest, subparagraph (B) or (A), as the case may be, of paragraph (1) shall not apply with respect to the same portion of such interest.

((4)) ** Due date** The additional tax imposed by this subsection shall become due and payable on the day which is 6 months after the date of the disposition or cessation referred to in paragraph (1).

((5)) ** Liability for tax; furnishing of bond** The qualified heir shall be personally liable for the additional tax imposed by this subsection with respect to his interest unless the heir has furnished bond which meets the requirements of subsection (e)(11).

((6)) ** Cessation of qualified use** For purposes of paragraph (1)(B), real property shall cease to be used for the qualified use if—

((A)) such property ceases to be used for the qualified use set forth in subparagraph (A) or (B) of subsection (b)(2) under which the property qualified under subsection (b), or

((B)) during any period of 8 years ending after the date of the decedent’s death and before the date of the death of the qualified heir, there had been periods aggregating more than 3 years during which—

((i)) in the case of periods during which the property was held by the decedent, there was no material participation by the decedent or any member of his family in the operation of the farm or other business, and

((ii)) in the case of periods during which the property was held by any qualified heir, there was no material participation by such qualified heir or any member of his family in the operation of the farm or other business.

((7)) ** Special rules**

((A)) ** No tax if use begins within 2 years** If the date on which the qualified heir begins to use the qualified real property (hereinafter in this subparagraph referred to as the commencement date) is before the date 2 years after the decedent’s death—

((i)) no tax shall be imposed under paragraph (1) by reason of the failure by the qualified heir to so use such property before the commencement date, and

((ii)) the 10-year period under paragraph (1) shall be extended by the period after the decedent’s death and before the commencement date.

((B)) ** Active management by eligible qualified heir treated as material participation** For purposes of paragraph (6)(B)(ii), the active management of a farm or other business by—

((i)) an eligible qualified heir, or

((ii)) a fiduciary of an eligible qualified heir described in clause (ii) or (iii) of subparagraph (C),

((C)) ** Eligible qualified heir** For purposes of this paragraph, the term “eligible qualified heir” means a qualified heir who—

((i)) is the surviving spouse of the decedent,

((ii)) has not attained the age of 21,

((iii)) is disabled (within the meaning of subsection (b)(4)(B)), or

((iv)) is a student.

((D)) ** Student** For purposes of subparagraph (C), an individual shall be treated as a student with respect to periods during any calendar year if (and only if) such individual is a student (within the meaning of section 152(f)(2)) for such calendar year.

((E)) ** Certain rents treated as qualified use** For purposes of this subsection, a surviving spouse or lineal descendant of the decedent shall not be treated as failing to use qualified real property in a qualified use solely because such spouse or descendant rents such property to a member of the family of such spouse or descendant on a net cash basis. For purposes of the preceding sentence, a legally adopted child of an individual shall be treated as the child of such individual by blood.

((8)) ** Qualified conservation contribution is not a disposition** A qualified conservation contribution (as defined in section 170(h)) by gift or otherwise shall not be deemed a disposition under subsection (c)(1)(A).

((d)) ** Election; agreement**

((1)) ** Election** The election under this section shall be made on the return of the tax imposed by section 2001. Such election shall be made in such manner as the Secretary shall by regulations prescribe. Such an election, once made, shall be irrevocable.

((2)) ** Agreement** The agreement referred to in this paragraph is a written agreement signed by each person in being who has an interest (whether or not in possession) in any property designated in such agreement consenting to the application of subsection (c) with respect to such property.

((3)) ** Modification of election and agreement to be permitted** The Secretary shall prescribe procedures which provide that in any case in which the executor makes an election under paragraph (1) (and submits the agreement referred to in paragraph (2)) within the time prescribed therefor, but—

((A)) the notice of election, as filed, does not contain all required information, or

((B)) signatures of 1 or more persons required to enter into the agreement described in paragraph (2) are not included on the agreement as filed, or the agreement does not contain all required information,

((e)) ** Definitions; special rules** For purposes of this section—

((1)) ** Qualified heir** The term “qualified heir” means, with respect to any property, a member of the decedent’s family who acquired such property (or to whom such property passed) from the decedent. If a qualified heir disposes of any interest in qualified real property to any member of his family, such member shall thereafter be treated as the qualified heir with respect to such interest.

((2)) ** Member of family** The term “member of the family” means, with respect to any individual, only—

((A)) an ancestor of such individual,

((B)) the spouse of such individual,

((C)) a lineal descendant of such individual, of such individual’s spouse, or of a parent of such individual, or

((D)) the spouse of any lineal descendant described in subparagraph (C).

((3)) ** Certain real property included** In the case of real property which meets the requirements of subparagraph (C) of subsection (b)(1), residential buildings and related improvements on such real property occupied on a regular basis by the owner or lessee of such real property or by persons employed by such owner or lessee for the purpose of operating or maintaining such real property, and roads, buildings, and other structures and improvements functionally related to the qualified use shall be treated as real property devoted to the qualified use.

((4)) ** Farm** The term “farm” includes stock, dairy, poultry, fruit, furbearing animal, and truck farms, plantations, ranches, nurseries, ranges, greenhouses or other similar structures used primarily for the raising of agricultural or horticultural commodities, and orchards and woodlands.

((5)) ** Farming purposes** The term “farming purposes” means—

((A)) cultivating the soil or raising or harvesting any agricultural or horticultural commodity (including the raising, shearing, feeding, caring for, training, and management of animals) on a farm;

((B)) handling, drying, packing, grading, or storing on a farm any agricultural or horticultural commodity in its unmanufactured state, but only if the owner, tenant, or operator of the farm regularly produces more than one-half of the commodity so treated; and

((C))

((i)) the planting, cultivating, caring for, or cutting of trees, or

((ii)) the preparation (other than milling) of trees for market.

((6)) ** Material participation** Material participation shall be determined in a manner similar to the manner used for purposes of paragraph (1) of section 1402(a) (relating to net earnings from self-employment).

((7)) ** Method of valuing farms**

((A)) ** In general** Except as provided in subparagraph (B), the value of a farm for farming purposes shall be determined by dividing—

((i)) the excess of the average annual gross cash rental for comparable land used for farming purposes and located in the locality of such farm over the average annual State and local real estate taxes for such comparable land, by

((ii)) the average annual effective interest rate for all new Federal Land Bank loans.

((B)) ** Value based on net share rental in certain cases**

((i)) ** In general** If there is no comparable land from which the average annual gross cash rental may be determined but there is comparable land from which the average net share rental may be determined, subparagraph (A)(i) shall be applied by substituting “average annual net share rental” for “average annual gross cash rental”.

((ii)) ** Net share rental** For purposes of this paragraph, the term “net share rental” means the excess of—

((I)) the value of the produce received by the lessor of the land on which such produce is grown, over

((II)) the cash operating expenses of growing such produce which, under the lease, are paid by the lessor.

((C)) ** Exception** The formula provided by subparagraph (A) shall not be used—

((i)) where it is established that there is no comparable land from which the average annual gross cash rental may be determined, or

((ii)) where the executor elects to have the value of the farm for farming purposes determined and that there is no comparable land from which the average net share rental may be determined under paragraph (8).

((8)) ** Method of valuing closely held business interests, etc.** In any case to which paragraph (7)(A) does not apply, the following factors shall apply in determining the value of any qualified real property:

((A)) The capitalization of income which the property can be expected to yield for farming or closely held business purposes over a reasonable period of time under prudent management using traditional cropping patterns for the area, taking into account soil capacity, terrain configuration, and similar factors,

((B)) The capitalization of the fair rental value of the land for farm land or closely held business purposes,

((C)) Assessed land values in a State which provides a differential or use value assessment law for farmland or closely held business,

((D)) Comparable sales of other farm or closely held business land in the same geographical area far enough removed from a metropolitan or resort area so that nonagricultural use is not a significant factor in the sales price, and

((E)) Any other factor which fairly values the farm or closely held business value of the property.

((9)) ** Property acquired from decedent** Property shall be considered to have been acquired from or to have passed from the decedent if—

((A)) such property is so considered under section 1014(b) (relating to basis of property acquired from a decedent),

((B)) such property is acquired by any person from the estate, or

((C)) such property is acquired by any person from a trust (to the extent such property is includible in the gross estate of the decedent).

((10)) ** Community property** If the decedent and his surviving spouse at any time held qualified real property as community property, the interest of the surviving spouse in such property shall be taken into account under this section to the extent necessary to provide a result under this section with respect to such property which is consistent with the result which would have obtained under this section if such property had not been community property.

((11)) ** Bond in lieu of personal liability** If the qualified heir makes written application to the Secretary for determination of the maximum amount of the additional tax which may be imposed by subsection (c) with respect to the qualified heir’s interest, the Secretary (as soon as possible, and in any event within 1 year after the making of such application) shall notify the heir of such maximum amount. The qualified heir, on furnishing a bond in such amount and for such period as may be required, shall be discharged from personal liability for any additional tax imposed by subsection (c) and shall be entitled to a receipt or writing showing such discharge.

((12)) ** Active management** The term “active management” means the making of the management decisions of a business (other than the daily operating decisions).

((13)) ** Special rules for woodlands**

((A)) ** In general** In the case of any qualified woodland with respect to which the executor elects to have this subparagraph apply, trees growing on such woodland shall not be treated as a crop.

((B)) ** Qualified woodland** The term “qualified woodland” means any real property which—

((i)) is used in timber operations, and

((ii)) is an identifiable area of land such as an acre or other area for which records are normally maintained in conducting timber operations.

((C)) ** Timber operations** The term “timber operations” means—

((i)) the planting, cultivating, caring for, or cutting of trees, or

((ii)) the preparation (other than milling) of trees for market.

((D)) ** Election** An election under subparagraph (A) shall be made on the return of the tax imposed by section 2001. Such election shall be made in such manner as the Secretary shall by regulations prescribe. Such an election, once made, shall be irrevocable.

((14)) ** Treatment of replacement property acquired in section 1031 or 1033 transactions**

((A)) ** In general** In the case of any qualified replacement property, any period during which there was ownership, qualified use, or material participation with respect to the replaced property by the decedent or any member of his family shall be treated as a period during which there was such ownership, use, or material participation (as the case may be) with respect to the qualified replacement property.

((B)) ** Limitation** Subparagraph (A) shall not apply to the extent that the fair market value of the qualified replacement property (as of the date of its acquisition) exceeds the fair market value of the replaced property (as of the date of its disposition).

((C)) ** Definitions** For purposes of this paragraph—

((i)) ** Qualified replacement property** The term “qualified replacement property” means any real property which is—

((I)) acquired in an exchange which qualifies under section 1031, or

((II)) the acquisition of which results in the nonrecognition of gain under section 1033.

((ii)) ** Replaced property** The term “replaced property” means—

((I)) the property transferred in the exchange which qualifies under section 1031, or

((II)) the property compulsorily or involuntarily converted (within the meaning of section 1033).

((f)) ** Statute of limitations** If qualified real property is disposed of or ceases to be used for a qualified use, then—

((1)) the statutory period for the assessment of any additional tax under subsection (c) attributable to such disposition or cessation shall not expire before the expiration of 3 years from the date the Secretary is notified (in such manner as the Secretary may by regulations prescribe) of such disposition or cessation (or if later in the case of an involuntary conversion or exchange to which subsection (h) or (i) applies, 3 years from the date the Secretary is notified of the replacement of the converted property or of an intention not to replace or of the exchange of property), and

((2)) such additional tax may be assessed before the expiration of such 3-year period notwithstanding the provisions of any other law or rule of law which would otherwise prevent such assessment.

((g)) ** Application of this section and section 6324B to interests in partnerships, corporations, and trusts** The Secretary shall prescribe regulations setting forth the application of this section and section 6324B in the case of an interest in a partnership, corporation, or trust which, with respect to the decedent, is an interest in a closely held business (within the meaning of paragraph (1) of section 6166(b)). For purposes of the preceding sentence, an interest in a discretionary trust all the beneficiaries of which are qualified heirs shall be treated as a present interest.

((h)) ** Special rules for involuntary conversions of qualified real property**

((1)) ** Treatment of converted property**

((A)) ** In general** If there is an involuntary conversion of an interest in qualified real property—

((i)) no tax shall be imposed by subsection (c) on such conversion if the cost of the qualified replacement property equals or exceeds the amount realized on such conversion, or

((ii)) if clause (i) does not apply, the amount of the tax imposed by subsection (c) on such conversion shall be the amount determined under subparagraph (B).

((B)) ** Amount of tax where there is not complete reinvestment** The amount determined under this subparagraph with respect to any involuntary conversion is the amount of the tax which (but for this subsection) would have been imposed on such conversion reduced by an amount which—

((i)) bears the same ratio to such tax, as

((ii)) the cost of the qualified replacement property bears to the amount realized on the conversion.

((2)) ** Treatment of replacement property** For purposes of subsection (c)—

((A)) any qualified replacement property shall be treated in the same manner as if it were a portion of the interest in qualified real property which was involuntarily converted; except that with respect to such qualified replacement property the 10-year period under paragraph (1) of subsection (c) shall be extended by any period, beyond the 2-year period referred to in section 1033(a)(2)(B)(i), during which the qualified heir was allowed to replace the qualified real property,

((B)) any tax imposed by subsection (c) on the involuntary conversion shall be treated as a tax imposed on a partial disposition, and

((C)) paragraph (6) of subsection (c) shall be applied—

((i)) by not taking into account periods after the involuntary conversion and before the acquisition of the qualified replacement property, and

((ii)) by treating material participation with respect to the converted property as material participation with respect to the qualified replacement property.

((3)) ** Definitions and special rules** For purposes of this subsection—

((A)) ** Involuntary conversion** The term “involuntary conversion” means a compulsory or involuntary conversion within the meaning of section 1033.

((B)) ** Qualified replacement property** The term “qualified replacement property” means—

((i)) in the case of an involuntary conversion described in section 1033(a)(1), any real property into which the qualified real property is converted, or

((ii)) in the case of an involuntary conversion described in section 1033(a)(2), any real property purchased by the qualified heir during the period specified in section 1033(a)(2)(B) for purposes of replacing the qualified real property.

((4)) ** Certain rules made applicable** The rules of the last sentence of section 1033(a)(2)(A) shall apply for purposes of paragraph (3)(B)(ii).

((i)) ** Exchanges of qualified real property**

((1)) ** Treatment of property exchanged**

((A)) ** Exchanges solely for qualified exchange property** If an interest in qualified real property is exchanged solely for an interest in qualified exchange property in a transaction which qualifies under section 1031, no tax shall be imposed by subsection (c) by reason of such exchange.

((B)) ** Exchanges where other property received** If an interest in qualified real property is exchanged for an interest in qualified exchange property and other property in a transaction which qualifies under section 1031, the amount of the tax imposed by subsection (c) by reason of such exchange shall be the amount of tax which (but for this subparagraph) would have been imposed on such exchange under subsection (c)(1), reduced by an amount which—

((i)) bears the same ratio to such tax, as

((ii)) the fair market value of the qualified exchange property bears to the fair market value of the qualified real property exchanged.

((2)) ** Treatment of qualified exchange property** For purposes of subsection (c)—

((A)) any interest in qualified exchange property shall be treated in the same manner as if it were a portion of the interest in qualified real property which was exchanged,

((B)) any tax imposed by subsection (c) by reason of the exchange shall be treated as a tax imposed on a partial disposition, and

((C)) paragraph (6) of subsection (c) shall be applied by treating material participation with respect to the exchanged property as material participation with respect to the qualified exchange property.

((3)) ** Qualified exchange property** For purposes of this subsection, the term “qualified exchange property” means real property which is to be used for the qualified use set forth in subparagraph (A) or (B) of subsection (b)(2) under which the real property exchanged therefor originally qualified under subsection (a).