; and (ii) has been modified to have the capability of operating on an alternative fuel (as defined in section 301 of the Energy Policy Act of 1992 ( 42 U.S.C. 13211 )). (B) Federal agency The term Federal agency has the meaning given the term Executive agency in section 105 of title 5, United States Code. (C) Natural gas vehicle The term natural gas vehicle means a motor vehicle that has the capability of operating on natural gas, including renewable natural gas. (D) Third-party vendor The term third-party vendor means any private entity that is in the business of arranging the lease or procurement of motor vehicles for other businesses, or for the Federal Government. (b) Minimum Federal fleet requirement relating to acquisition of medium and heavy duty motor vehicles Subsection (b) of section 303 of the Energy Policy Act of 1992 ( 42 U.S.C. 13212 ) is amended to read as follows: (b) Percentage requirements (1) Light duty motor vehicles Of the total number of light duty motor vehicles acquired by a Federal fleet, at least the following percentages shall be alternative fueled vehicles: (A) 25 percent in fiscal year 1996. (B) 33 percent in fiscal year 1997. (C) 50 percent in fiscal year 1998. (D) 75 percent in fiscal year 1999 and each fiscal year thereafter. (2) Medium duty passenger vehicles and heavy duty motor vehicles Of the total number of medium duty passenger vehicles and heavy duty motor vehicles acquired by a Federal fleet, at least the following percentages shall be alternative fueled vehicles: (A) 25 percent in fiscal year 2020. (B) 33 percent in fiscal year 2021. (C) 50 percent in fiscal year 2022. (D) 75 percent in fiscal year 2023 and each fiscal year thereafter. (3) Exception With respect to paragraph (1) or (2), as the case may be, the Secretary, in consultation with the Administrator of General Services, where appropriate, may permit a Federal fleet to acquire a smaller percentage than is required in such paragraph, so long as the aggregate percentage acquired by all Federal fleets is at least