Okla. Stat. tit. 40, § 40-556: Time of employer testing - Payment of costs

Any drug or alcohol testing by an employer shall be deemed work

time for purposes of compensation and benefits for current

employees.

An employer shall pay all costs of testing for drugs or alcohol

required by the employer. Provided, however, if an employee or

applicant requests a confirmation test of a sample within twenty-

four (24) hours of receiving notice of a positive test in order to

challenge the results of a positive test, the employee or applicant

shall pay all costs of the confirmation test, unless the

confirmation test reverses the findings of the challenged positive

test. In such case, the employer shall reimburse the individual for

the costs of the confirmation test.