On and after the date that an agreement is executed pursuant to Section 53987, or if a local agency adopts a plan which is consistent with a priority list adopted by a state agency, or if a state agency adopts a priority list consistent with a plan adopted by a local agency, no state agency shall alter, defer, or deny priority or allocation of state funds or alter, defer, or deny priority or allocation of state construction, except where necessary for reasons beyond the control of either agency, including, but not limited to, environmental complications, a change in the scope of the project, or insufficient funds.

The provisions of this section shall not apply to the Clean Water Grant Program, which the federal Environmental Protection Agency has delegated to the State Water Resources Control Board to administer pursuant to the Porter-Cologne Water Quality Control Act and the Federal Clean Water Act, or to public facilities which are not owned by a local agency or a state agency.