Amends 23 U.S.C. 171 by redesignating existing subsections (h) and (i) as (k) and (l), respectively; inserting new subsections after (g) establishing: (h) a federal share of 90% for grants benefitting small, rural, or disadvantaged communities (Secretary may waive to 100% for entities unable to pay or facing significant financial hardship); (i) tribal technical assistance allowing the Secretary to use up to 0.5% of amounts made available for the program each fiscal year to provide application and technical assistance and to reduce time between project selection and obligation of funds, with those amounts expendable by the Secretary or through contracts with Federal, Tribal, regional, State, private, or nonprofit entities; and (j) grant administration permitting the Secretary to retain up to 0.5% of amounts made available each fiscal year to review applications, obligate and administer awards, and carry out specified statutory requirements.