Cal. Civ. Code § 4790

Notwithstanding the provisions of the declaration, a member is entitled to reasonable access to the common area for the purpose of maintaining the internal and external telephone wiring made part of the exclusive use common area of the member’s separate interest pursuant to subdivision (c) of Section 4145. The access shall be subject to the consent of the association, whose approval shall not be unreasonably withheld, and which may include the association’s approval of telephone wiring upon the exterior of the common area, and other conditions as the association determines reasonable.