; (B) the United States obligation to make a substitute supply of water available to the San Joaquin River Exchange Contractors; and (C) the Secretary’s obligation to make water available to managed wetlands pursuant to section 3406(d) of the Central Valley Project Improvement Act ( Public Law 102–575 ). (b) Protection of municipal and industrial supplies Nothing in subsection (a) shall be deemed to— (1) modify any provision of a water service contract that addresses municipal and industrial water shortage policies of the Secretary; (2) affect or limit the authority of the Secretary to adopt or modify municipal and industrial water shortage policies; (3) affect or limit the authority of the Secretary to implement municipal and industrial water shortage policies; or (4) affect allocations to Central Valley Project municipal and industrial contractors pursuant to such policies. Neither subsection (a) nor the Secretary’s implementation of subsection (a) shall constrain, govern or affect, directly, the operations of the Central Valley Project’s American River Division or any deliveries from that Division, its units or facilities. (c) No effect on allocations This section shall not— (1) affect the allocation of water to Friant Division contractors