California Code, Business and Professions Code - BPC § 19530

(a) The board shall have the authority to allocate racing weeks to an applicant or applicants pursuant to the provisions of this article and Article 6.5 (commencing with Section 19540) and to specify such racing days, dates, and hours for horse racing meetings as will be in the public interest, and will subserve the purposes of this chapter. The decision of the board as to those racing days, dates, and hours shall be subject to change, limitation, restriction, or reallocation only by the board. No municipality or county shall adopt or enforce any ordinance or regulation that has or may have the effect of directly or indirectly regulating, limiting, restricting, or reallocating the racing days and dates of horse racing meetings.

(b) The board may, at any time, change, limit, restrict, or reallocate racing weeks, days, or dates that are allocated pursuant to this section regardless of whether a condition giving rise to that action is foreseen at the time of allocation or whether a license is issued to conduct a horse racing meeting during an allocated week, day, or date. The board's exercise of authority pursuant to this subdivision is not a revocation subject to the proceedings required by Section 19461, regardless of any effect on a license issued under this chapter.