California Code, Public Contract Code - PCC § 21563

Any contract with any other public or private corporation pursuant to Section 21562 may provide for contributions to be made by each party and for the division and apportionment of the expenses of such acquisitions and operations, and the division and apportionment of the benefits, services, and products from the contract.  Any such contract may provide for an agency to effect such acquisitions and carry on such operations, and shall provide in the powers and methods of procedure for such agency the method by which such agency may contract.  Any such contract may contain such other and further covenants and agreements as may be necessary and convenient to accomplish such purposes.