Cal. Code Regs. tit. 4, § 1624
The owner of any horse which has not previously raced at a recognized meeting in the United States or which has raced elsewhere, must furnish to the racing secretary prior to the entry of such horse to any race in this State, performance records of said horse's races during the past year showing where and when said horse did race, the distance, weight carried and said horse's finishing position and time. If such records are incomplete or unavailable, the owner or his representatives must submit an affidavit to such effect to the racing secretary. If such records or affidavit are not submitted, such horse shall be ineligible to start unless approval is first obtained from the Board.