California Code
CHAPTER 6 - Limitations
Section 21167.5.

21167.5. Proof of prior service by mail upon the public agency carrying out or approving the project of a written notice of the commencement of any action or proceeding described in Section 21167 identifying the project shall be filed concurrently with the initial pleading in such action or proceeding.

(Added by Stats. 1972, Ch. 1154.)