Okla. Stat. tit. 11, § 11-34-106: Use of unmarked vehicle prohibited – Official uniform

required.

The State of Oklahoma hereby declares and states that the

increased number of persons impersonating law enforcement officers

by making routine traffic stops while using unmarked cars is a

threat to the public health and safety of all the citizens of the

State of Oklahoma; therefore it shall be unlawful for any municipal

police department to use any vehicle which is not clearly marked as

a law enforcement vehicle for routine traffic enforcement except as

provided in Section 12-218 of Title 47 of the Oklahoma Statutes. In

addition to Section 12-218 of Title 47 of the Oklahoma Statutes, the

peace officer operating the law enforcement vehicle for routine

traffic stops shall be dressed in the official uniform including

shoulder patches, badge, and any other identifying insignias

normally used by the employing law enforcement agency.