Okla. Admin. Code § 670:20-9-2
Boat and motor registrations expire June 30 of each year. The month of July is a grace period. On August 1, the penalty of Twenty-five Cents ($ .25) per day begins for a period of three (3) months, (August, September and October). On November 1, a Twenty-five Dollar ($25.00) penalty is due. However, the penalty on a renewal will never be more than the regular renewal fee.
Added at 41 Ok Reg, Number 23, effective 8-25-24