Section 9002 Of Article 1. Numbering And Election Of Legislators From California Government Code >> Division 2. >> Title 2. >> Part 1. >> Chapter 1.5. >> Article 1.

. At the general election in every fourth year after 1908 a Senator shall be elected in each odd-numbered senatorial district. At the general election in every fourth year after 1910 a Senator shall be elected in each even-numbered district.