A minimum of 10 per centum of the annual apportionment distributed by the Secretary to each State for the purposes of carrying out this subchapter shall be transferred by the State, pursuant to the requirements of this subchapter, to local governments which are certified under section
470a
(c) of this title for historic preservation projects or programs of such local governments. In any year in which the total annual apportionment to the States exceeds $65,000,000, one half of the excess shall also be transferred by the States to local governments certified pursuant to section
470a
(c) of this title.