Okla. Admin. Code § 600:10-1-15
The authorized scope of practice for Trainee, State Licensed, State Certified Residential and State Certified General Appraisers shall be the scope of practice specified by the corresponding section of the Real Property Appraiser Qualification Criteria promulgated by the Appraiser Qualification Board of the Appraisal Foundation. For the purpose of scope of practice considerations, a complex residential property is defined as a property consisting of one to four residential units that exhibits one or more atypical factors such as size, design characteristics, locational characteristics, physical condition characteristics, or ownership; or exhibits non-conforming zoning, landmark or historical place designation, lack of appraisal data or other similar unusual or atypical factors.
Okla. Admin. Code § 600:10-1-15