California Code, Business and Professions Code - BPC § 1000-12

(a) Licenses issued under the provisions of this section expire at 12 midnight on the last day of the month of birth of licentiates of the board.

(b) The board shall establish regulations for the administration of a birth month renewal program.

(c) A person practicing chiropractic within this state shall, on or before the last day of the person's month of birth of each year, after a license is issued to the person under this act, pay to the Board of Chiropractic Examiners the renewal fee specified under subdivision (d).

(d) On and after January 1, 2019, the renewal fee shall be the amount specified in subdivision (c) of Section 1006.5 of the Business and Professions Code.

(e) The secretary shall mail to a licensed chiropractor in this state, on or before 60 days prior to the last day of the month of the licensee's birth each year, a notice that the renewal fee will be due on or before the last day of the next month following the licensee's birth.  Nothing in this act shall be construed to require the receipts to be recorded in like manner as original licenses.

(f) The failure, neglect or refusal of a person holding a license or certificate to practice under this act in the State of California to pay the annual fee during the time the license remains in force shall, after a period of 60 days from the last day of the month of the licensee's birth, automatically work a forfeiture of the license or certificate, and it shall not be restored except upon the written application therefor and the payment to the board of a fee of twice the annual amount of the renewal fee in effect at the time the restoration application is filed except that a licensee who fails, refuses, or neglects to pay the annual tax within a period of 60 days after the last day of the month of the licensee's birth of each year shall not be required to submit to an examination for the reissuance of the certificate.