49 U.S.C. § 45103
Section 45103 · Prohibited service
Current version, with additions and removals from the July 5, 1994 version.
(1) used the alcohol or controlled substance when on duty;
(1) used the alcohol or controlled substance when on duty;
(2) began or completed a rehabilitation program described in section 45105 of this title before using the alcohol or controlled substance; or
(2) began or completed a rehabilitation program described in section 45105 of this title before using the alcohol or controlled substance; or
(3) refuses to begin or complete a rehabilitation program described in section 45105 of this title after a finding by the Administrator under this section.
(3) refuses to begin or complete a rehabilitation program described in section 45105 of this title after a finding by the Administrator under this section.