With respect to program years beginning with the program year for which grants are made available from amounts appropriated for fiscal year 1982 under section
5303 of this title, the population of any unit of general local government which is included in that of an urban county as provided in subparagraph (A)(ii) or (D) of subsection (a)(6) of this section shall be included in the population of such urban county for three program years beginning with the program year in which its population was first so included and shall not otherwise be eligible for a grant under section
5306 of this title as a separate entity, unless the urban county does not receive a grant for any year during such three-year period.