(a)Purpose of section. Sections 35.736 through 35.738 govern Tribal Response Program Grants (as defined in section 128(a) of the Comprehensive Environmental Response, Compensation, and Liability Act (CERCLA)).(b)Purpose of program. Tribal Response Program Grants are awarded to Tribes to establish or enhance the response program of the Tribe; capitalize a revolving loan fund for brownfield remediation under section 104(k)(3) of CERCLA; or purchase insurance or develop a risk sharing pool, an indemnity pool, or insurance mechanism to provide financing for response actions under a Tribal response program.