; and (2) in issuing such regulations, solicit and receive comments from stakeholders not later than 180 days after the date of enactment of this section. (e) Grant requirements The Secretary may approve modified grant requirements for projects carried out using a grant under this section. (f) Limitations (1) Period of grant A grant under this section shall be for a 3-year period beginning on the date on which the first payment of any amount under the grant is provided to an eligible entity. (2) Rural grant minimum The Secretary shall award not less than 20 percent of the total amounts made available to carry out this section to support activities described under subsection (a) in rural areas. (3) Government share of costs The Federal share of the total project cost of a project carried out under this section may not exceed 80 percent. (4) Allocation Of the amounts authorized to be appropriated to carry out this section for each fiscal year, not more than 20 percent may be awarded under subsection (a) to a single entity. (g) Best practices The Secretary shall annually collect from, review, and disseminate to public transportation agencies findings or best practices from projects funded under this section. (h) Definitions In this section: (1) Commuter highway vehicle The term commuter highway vehicle has the meaning given such term in section 132(f)(5)(B) of the Internal Revenue Code of 1986. (2) High-performing public transportation The term high-performing public transportation means a public transportation service, whether provided by a public agency, private nonprofit, or for-profit organization, that is able to collect all operating costs through fare-box revenue or other dedicated sources for an activity and increases access to public transportation. (3) Micro-transit The term micro-transit means internet-enabled, public transportation services that use dynamically generated routes calculated by algorithms developed to increase the occupancy of vehicles. . (b) Clerical amendment The analysis for chapter 53