California Code
CHAPTER 5 - Enactment of Statutes and Adoption of Resolutions
Section 9510.5.

9510.5. There shall be two series of bill chapter numbers for each two-year regular session of the Legislature. Bills deposited with the Secretary of State from the beginning of the two-year session through December 31 of the odd-numbered year shall be designated “Statutes of [odd-numbered year], Chapter ____.” Bills deposited with the Secretary of State after December 31 of the odd-numbered year shall be designated “Statutes of [even-numbered year], Chapter ____.” Concurrent resolutions, joint resolutions, and proposed constitutional amendments adopted by the Legislature shall be chaptered as resolution chapters with a different series of numbers than those assigned to bills but shall otherwise be numbered and designated in the same manner as bills enacted into law.

(Added by Stats. 1973, Ch. 334.)