The term "contract" or "agreement" does not include a home improvement contract as defined in Sections 7151.2 and 7159 of the Business and Professions Code, nor does it include plans, specifications, description of work to be done and materials to be used, or collateral security taken or to be taken for the retail buyer's obligation contained in a contract for the installation of goods by a contractor licensed pursuant to Chapter 9 (commencing with Section 7000) of Division 3 of the Business and Professions Code, if the home improvement contract or installation contract is otherwise a part of a contract described in subdivision (b).
Matters ordinarily incorporated by reference in contracts or agreements as described in paragraph (3) of subdivision (b), including, but not limited to, rules and regulations governing a tenancy and inventories of furnishings to be provided by the person described in subdivision (b), are not included in the term "contract" or "agreement."
Ca. Civ. Code § 1632