California Code, Civil Code - CIV § 903

If a builder offers an enhanced protection agreement in place of the provisions set forth in Chapter 2 (commencing with Section 896), the election to do so shall be made in writing with the homeowner no later than the close of escrow. The builder shall provide the homeowner with a complete copy of Chapter 2 (commencing with Section 896) and advise the homeowner that the builder has elected not to be subject to its provisions. If any provision of an enhanced protection agreement is later found to be unenforceable as not meeting the minimum standards of Chapter 2 (commencing with Section 896), a builder may use this chapter in lieu of those provisions found to be unenforceable.