California Code
ARTICLE 16 - Enforcement
Section 13593.

13593. It is unlawful for any person, or any member, officer, agent, or employee of a firm, association, or corporation, to refuse to permit any person authorized by this article to take such sample or samples permitted by this chapter, or to prevent or to attempt to prevent the taking of such sample or samples.

(Added by Stats. 1980, Ch. 636, Sec. 5.)