Wat. Code, § 13369

(a) The state board, in consultation with the regional boards, the California Coastal Commission, and other appropriate state agencies and advisory groups, as necessary, shall prepare a detailed program for the purpose of implementing the state’s nonpoint source management plan. The board shall address all applicable provisions of the Clean Water Act, including Section 319 (33 U.S.C. Sec. 1329), as well as Section 6217 of the federal Coastal Zone Act Reauthorization Amendments of 1990 (16 U.S.C. Sec. 1455b), and this division in the preparation of this detailed implementation program.

(b) (1) The program shall include all of the following components:

(A) Nonregulatory implementation of best management practices.

(B) Regulatory-based incentives for best management practices.

(C) The adoption and enforcement of waste discharge requirements that will require the implementation of best management practices.

(2) In connection with its duties under this subdivision to prepare and implement the state’s nonpoint source management plan, the state board shall develop, on or before February 1, 2001, guidance to be used by the state board and the regional boards for the purpose of describing the process by which the state board and the regional boards will enforce the state’s nonpoint source management plan, pursuant to this division.