In determining the amount of any State’s Federal share of expenditures for planning, administration, and services incurred by it under a State plan approved in accordance with section
721 of this title, there shall be disregarded—
No payment may be made from funds provided under one provision of this chapter relating to any cost with respect to which any payment is made under any other provision of this chapter, except that this section shall not be construed to limit or reduce fees for services rendered by community rehabilitation programs.