decennial Census, as eligible to receive grant awards pursuant to subsection (a). (B) Limitation on amounts The aggregate amount of grants made to eligible local governments that receive such status pursuant to subparagraph (A) of this paragraph shall not exceed 15 percent of the total amounts appropriated pursuant to this title for all grants under subsection (a). (c) Matching requirement (1) In general The Secretary shall ensure that each eligible local government that receives a grant pursuant to subsection (a) shall supplement, in accordance with this subsection, the amount received under such grant with an amount that is not less than 3/7 of such grant amount