Okla. Admin. Code § 670:15-33-2
In addition to terms defined in 47 O.S., §1-101 et seq., the following words or terms, when used in this Subchapter, shall have the following meaning unless the context clearly indicates otherwise. Use of the singular term includes the plural and use of the plural term includes the singular.
"Business day" means Monday through Friday 8:00 a.m. to 5:00 p.m., excluding state and federal holidays.
"Commercial motor vehicle" means a vehicle used for training students in Class A, B, or C commercial motor vehicles as defined in 47 O.S. §1-107.1, 1-107.2, 1-107.3.
"Course of study" means a course of study in truck driver training, including highway signs, signals, markings and design, rules of the road, state laws, local ordinances, basic driving maneuvers, and safe operation of commercial motor vehicles on streets and highways; including 49 CFR 380.600 - 609 Subpart F-Entry Level Driver Training Requirements set forth in appendices A through E of part 380.
"Credential" means endorsements, major and/or minor teaching areas, licenses, as well as professional, standard, provisional, temporary, and emergency certificates.
"Endorsements" means credentials placed on valid licenses or certificates, or both, to indicate that the holder is eligible to teach specific subjects. An endorsement qualifies the holder to teach a full day in the subject of th e endorsement.
"Instructor" means a qualified commercial truck driver training instructor who is certified by Service Oklahoma to instruct students desiring to apply for a commercial license, at an approved commercial truck driver training school, in accordance with 49 C.F.R. § 380.605.
"School" means a business enterprise conducted as a commercial truck driver training school by an individual, association, partnership, or corporation for the purpose of education and training of students desiring to apply for a commercial driver license, including the requirements set forth in 49 CFR 380.700-725 Subpart G- Registry of Entry Level Driver Training Providers.
Okla. Admin. Code § 670:15-33-2