Okla. Admin. Code § 120:10-17-3
(a) This section applies to all new vehicle use areas and existing use areas altered or improved subsequent to the adoption of this regulation, and whenever a structure is enlarged or a change in use occurs that increases the required parking or loading.
(b) Surface parking lots shall have a minimum landscaped area equal to at least 15 percent of the gross paved area within the lot.
Added at 23 Ok Reg 2931, eff 7-13-06
Amended at 34 Ok Reg 849, eff 9-11-17