(a) Subpart 31.6 provides principles and standards for determining costs applicable to contracts with State, local, and federally recognized Indian tribal governments. They provide the basis for a uniform approach to the problem of determining costs and to promote efficiency and better relationships between State, local, and federally recognized Indian tribal governments, and Federal Government entities. They apply to all programs that involve contracts with State, local, and federally recognized Indian tribal governments, except contracts with—

(1) Publicly financed educational institutions subject to subpart 31.3; or

(2) Publicly owned hospitals and other providers of medical care subject to requirements promulgated by the sponsoring Government agencies.

(b) The Office of Management and Budget will approve any other exceptions in particular cases when adequate justification is presented.