Grants awarded under this subsection shall be for a 2-year period. (5) Selection of eligible recipients In carrying out the program under this subsection, the Secretary shall award not more than 20 percent of grants to eligible entities located in rural areas. (6) Uses of funds An eligible entity receiving a grant under this subsection shall use such grant to implement a reduced fare transit program and offset lost fare revenue. (7) Definitions In this subsection: (A) Eligible entity The term eligible entity means a State, local, or Tribal governmental entity that operates a public transportation service and is a recipient or subrecipient of funds under this chapter. (B) Low-income individual The term low-income individual means an individual— (i) that has qualified for— (I) any program of medical assistance under a State plan or under a waiver of the plan under title XIX of the Social Security Act ( 42 U.S.C. 1396 et seq.)