Okla. Admin. Code § 325:25-1-4
The Racing Secretary shall establish the conditions for any race, the allowances or handicaps to be established for specific races, the procedures for the acceptance of entries and declarations, and such other conditions as are necessary to provide and conduct the organization's race meeting. The Racing Secretary is responsible for the receipt of entries and declarations for all races. The Racing Secretary, employees of their department, or Racing Officials shall not disclose any pertinent information concerning entries which have been submitted until all entries are closed. After an entry to a race for which conditions have been published has been accepted by the Racing Secretary or their delegate, no condition of such race shall be changed, amended or altered, nor shall any new condition for such race be imposed.
Okla. Admin. Code § 325:25-1-4