((a)) ** Reorganization** The Secretary may allocate or reallocate functions among the officers of the Department, and may establish, consolidate, alter, or discontinue organizational units within the Department, but only—

((1)) pursuant to ; or

((2)) after the expiration of 60 days after providing notice of such action to the appropriate congressional committees, which shall include an explanation of the rationale for the action.

((b)) ** Limitations**

((1)) ** In general** Authority under subsection (a)(1) does not extend to the abolition of any agency, entity, organizational unit, program, or function established or required to be maintained by this chapter.

((2)) ** Abolitions** Authority under subsection (a)(2) does not extend to the abolition of any agency, entity, organizational unit, program, or function established or required to be maintained by statute.