Okla. Stat. tit. 47, § 47-6-110.1: Endorsements

A. The following endorsements shall be placed on an Oklahoma

driver license to any person qualifying therefore as determined by

Service Oklahoma. Any person having an original Class A, B, C or D

Oklahoma driver license shall only be required to take the

supporting written endorsement testing which is required to endorse

the original Class A, B, C or D Oklahoma driver license.

Endorsement Authorizes the operation of:

"H" A non-tank-type vehicle used to

transport hazardous materials in

placardable amounts pursuant to 49

C.F.R., Part 172, subpart F;

"M" A motorcycle;

"N" A tank vehicle as defined in Section

1-173.1 of this title;

"P" A vehicle designed by the

manufacturer to transport sixteen or

more passengers, including the

driver;

"S" A school bus;

"T" A vehicle with double or triple

trailers;

"X" A tank vehicle used to transport

hazardous materials in placardable

amounts pursuant to 49 C.F.R., Part

172, subpart F.

B. Service Oklahoma may also provide for additional

endorsements as may be needed or as otherwise provided for by law.

C. No person shall operate a motor vehicle requiring

endorsements as provided for in this section without having a valid

Class A, B, C or D license with the required endorsements.

D. All endorsements as provided for in this section must be

obtained prior to the operation of such vehicles. However, the

requirement for a hazardous materials endorsement is not required

for the operation of farm vehicles used to transport pesticides,

fertilizers, or other products integral to farming, but which are

defined as hazardous materials. If, after obtaining a hazardous

material endorsement, a person becomes ineligible for the hazardous

material endorsement pursuant to state or federal law, or both, or

any regulation, Service Oklahoma shall provide notice as provided in

Section 2-116 of this title. A person will have thirty (30) days

from the date of the notice to appear at a designated testing

facility to apply and be issued a commercial driver license without

the endorsement. Failure to comply within the required time shall

be grounds for Service Oklahoma to disqualify the commercial driver

license of the person until compliance has been met.