California Code, Government Code - GOV § 4216.21

(a) For an investigation that the board undertakes as a result of a complaint of a violation of Section 4216.2, 4216.3, 4216.4, or 4216.10, the complainant shall not file an action in court for damages based on those violations until the investigation is complete, or for 6 months after the investigation begins, whichever comes first, during which time, applicable statutes of limitation shall be tolled.

(b) If a complainant files an action in court against a person for damages based upon violations of Section 4216.2, 4216.3, 4216.4, or 4216.10, after the completion of a board investigation in which the person was found not to have violated the article, the complainant shall also notify the board when the action is filed.

(c) This section only applies to a claim for damages to a subsurface installation.

(d) This section shall become operative on July 1, 2020.