California Code, Public Resources Code - PRC § 21167

(a) An action or proceeding alleging that a public agency is carrying out or has approved a project that may have a significant effect on the environment without having determined whether the project may have a significant effect on the environment shall be commenced within 180 days from the date of the public agency's decision to carry out or approve the project, or, if a project is undertaken without a formal decision by the public agency, within 180 days from the date of commencement of the project.

(b) An action or proceeding alleging that a public agency has improperly determined whether a project may have a significant effect on the environment shall be commenced within 30 days from the date of the filing of the notice required by subdivision (a) of Section 21108 or subdivision (a) of Section 21152.

(c) An action or proceeding alleging that an environmental impact report does not comply with this division shall be commenced within 30 days from the date of the filing of the notice required by subdivision (a) of Section 21108 or subdivision (a) of Section 21152 by the lead agency.

(d) An action or proceeding alleging that a public agency has improperly determined that a project is not subject to this division pursuant to subdivision (b) of Section 21080shall be commenced within 35 days from the date of the filing by the public agency, or person specified in subdivision (b) or (c) of Section 21065, of the notice authorized by subdivision (b) of Section 21108 or subdivision (b) of Section 21152. If the notice has not been filed, the action or proceeding shall be commenced within 180 days from the date of the public agency's decision to carry out or approve the project, or, if a project is undertaken without a formal decision by the public agency, within 180 days from the date of commencement of the project.

(e) An action or proceeding alleging that another act or omission of a public agency does not comply with this division shall be commenced within 30 days from the date of the filing of the notice required by subdivision (a) of Section 21108 or subdivision (a) of Section 21152.

(f) If a person has made a written request to the public agency for a copy of the notice specified in Section 21108 or 21152before the date on which the agency approves or determines to carry out the project, then not later than five days from the date of the agency's action, the public agency shall deposit a written copy of the notice addressed to that person in the United States mail, first class postage prepaid. The date upon which this notice is mailed shall not affect the time periods specified in subdivisions (b), (c), (d), and (e).