28 CFR § 76.41 - Expungement of records.
(a) The Attorney General shall expunge all official Department records created pursuant to this part upon application of a respondent at any time after the expiration of three (3) years from the date of the final order of assessment if:
(5) The respondent agrees to submit to a drug test, and such test shows the individual to be drug free.
(b) A non-public record of a disposition under this part shall be retained by the Department solely for the purpose of determining in any subsequent proceeding whether the person qualifies for a civil penalty or expungement under this part.
(c) If a record is expunged under this part, the individual for whom such an expungement was made shall not be held guilty of perjury, false swearing, or making a false statement by reason of his failure to recite or acknowledge a proceeding under this part or the results thereof in response to an inquiry made of him for any purpose.