Except as provided in section
12594 of this title, the Corporation share of the cost (including the costs of member living allowances, employment-related taxes, health care coverage, and workers’ compensation and other necessary operation costs) of carrying out a national service program that receives the assistance under subsection (a) of this section, whether the assistance is provided directly or as a subgrant from the original recipient of the assistance, may not exceed 75 percent of such cost.