CA Gov't Code Section 50284

If the legislative body determines that the owner has breached any of the conditions of the contract provided for in this article or has allowed the property to deteriorate to the point that it no longer meets the standards for a qualified historical property, the legislative body shall do one of the following:

(a)

Cancel the contract by following the procedures specified in Sections 50285 and 50286.

(b)

Bring any action in court necessary to enforce a contract, including, but not limited to, an action to enforce the contract by specific performance or injunction.