California Code, Government Code - GOV § 51015.4

(a) Each operator shall, as specified in regulations provided for in subdivision (c), maintain each valve and check valve that is necessary for the safe operation of its pipeline systems in good working order at all times.

(b) Each operator shall provide protection for each valve and check valve from unauthorized operation and from vandalism.

(c) The State Fire Marshal shall adopt regulations, not later than June 30, 1991, which establish procedures for maintaining, testing, and inspecting mainline valves and check valves on intrastate hazardous liquid pipelines.