W. Va. Code § 21-3E-3
The Legislature declares that the public policy of this state is to advance the confidence of West Virginia workers that they are in a safe workplace and to enhance the viability of the workplace they labor in by recognizing the right of West Virginia's employers to require mandatory drug testing, not only of applicants, but of current employees: Provided, That this article does not abrogate the right of privacy, including the right of an individual to be let alone and to keep secret his or her private communications, conversations and affairs, as stated in Roach v. Harper, 143 W. Va. 869, but rather determines that the right of privacy is outweighed by the public policy stated in this section if an employer meets the requirements set forth in this article.
This article applies only to employers, as defined in section three of this article, not previously made subject of drug and alcohol testing statutory provisions established by the Legislature including, but not limited to, employers covered by section one, article one-a, chapter twenty-two-a of the code, et seq., and section one, article one-d, chapter twenty-one of the code et seq.
W. Va. Code § 21-3E-3