California Code, Water Code - WAT § 81437

(a)(1) The agency may acquire from the City and County of San Francisco the right to receive all or a portion of the amounts payable by BAWSCA members under the July 2009 Water Supply Agreement.

(2) The City and County of San Francisco may sell to the agency its right to receive amounts payable by BAWSCA members under the July 2009 Water Supply Agreement.

(b)(1) If the agency acquires, and the City and County of San Francisco sells, the right to receive amounts payable pursuant to subdivision (a), if requested by the agency, the City and County of San Francisco shall continue to collect amounts payable by BAWSCA members under the July 2009 Water Supply Agreement in accordance with the terms of that agreement and the City and County of San Francisco shall transfer amounts so collected to the agency on a monthly basis or on a periodic basis agreed to by the agency and the City and County of San Francisco.

(2) The agency shall apply amounts received pursuant to this subdivision to pay debt service on any bonds issued by the agency for a use authorized by Section 81437.5 and to satisfy all other obligations of the agency related to these bonds.

(3) The agency may distribute any amounts received pursuant to this subdivision not needed for the purposes of this subdivision to BAWSCA members.  The agency may condition any distribution pursuant to this paragraph upon BAWSCA members' agreement to waive any right of prepayment respecting any amounts purchased that the member may have under the July 2009 Water Supply Agreement.