Okla. Stat. tit. 40, § 40-553: Construction of act

A. The Standards for Workplace Drug and Alcohol Testing Act

shall not be construed as requiring or encouraging employers to

conduct drug or alcohol testing.

B. Except as provided in subsection C of this section,

employers who choose to conduct drug or alcohol testing of job

applicants or persons employed in this state shall be governed by

the provisions of this act and the rules promulgated pursuant

thereto.

C. Drug or alcohol testing required by and conducted pursuant

to federal law or regulation shall be exempt from the provisions of

the Standards for Workplace Drug and Alcohol Testing Act and the

rules promulgated pursuant thereto.

D. This act shall not be construed as preventing the

negotiation of collective bargaining agreements that provide greater

protection to employees or applicants than is provided by this act.