14 C.F.R. § 120.11 – Refusal to submit to a drug or alcohol test by a Part 61 certificate holder.

(a) This section applies to all individuals who hold a certificate under part 61 of this chapter and who are subject to drug and alcohol testing under this part.
(b) Refusal by the holder of a certificate issued under part 61 of this chapter to take a drug or alcohol test required under the provisions of this part is grounds for:
1. (1) Denial of an application for any certificate, rating, or authorization issued under part 61 of this chapter for a period of up to 1 year after the date of such refusal; and
2. (2) Suspension or revocation of any certificate, rating, or authorization issued under part 61 of this chapter.