Limitation on duration of grant and requirement of matching funds

The period during which payments are made to a State from a grant under section 280c(a) of this title may not exceed 3 years. Such payments shall be subject to annual evaluation by the Secretary. The Secretary may not make a grant under section 280c(a) of this title to a State unless the State agrees to make available, directly or through donations from public or private entities, non-Federal contributions toward the costs of services to be provided pursuant to such section in an amount equal to— Non-Federal contributions required in subsection (b) may be in cash or in kind, fairly evaluated, including plant, equipment, or services. Amounts provided by the Federal Government, or services assisted or subsidized to any significant extent by the Federal Government, may not be included in determining the amount of such non-Federal contributions.