(a)Purpose of section. Sections 35.580 through 35.588 govern water pollution control grants to eligible Tribes and Intertribal Consortia (as defined in § 35.502 ) authorized under sections 106 and 518 of the Clean Water Act.(b)Purpose of program. Water pollution control grants are awarded to assist Tribes and Intertribal Consortia in administering programs for the prevention, reduction, and elimination of water pollution, including programs for the development and implementation of ground-water protection strategies.(c)Associated program requirements. Program requirements for water quality planning and management activities are provided in 40 CFR part 130.