21 C.F.R. § 1317.05
(a) Practitioner inventory. Any registered practitioner in lawful possession of a controlled substance in its inventory that desires to dispose of that substance shall do so in one of the following ways:
(4) Request assistance from the Special Agent in Charge of the Administration in the area in which the practitioner is located.
(ii) The Special Agent in Charge shall instruct the registrant to dispose of the controlled substance in one of the following manners:
(b) Non-practitioner inventory. Any registrant that is a non-practitioner in lawful possession of a controlled substance in its inventory that desires to dispose of that substance shall do so in one of the following ways:
(4) Promptly transport that controlled substance by its own means to the registered location of a reverse distributor, the location of destruction, or the registered location of any person authorized to receive that controlled substance for the purpose of return or recall as described in paragraph (b)(3) of this section.
(c) Collected controlled substances. Any collector in lawful possession of a controlled substance acquired by collection from an ultimate user or other authorized non-registrant person shall dispose of that substance in the following ways:
(1) Mail-back program. Upon receipt of a sealed mail-back package, the collector shall promptly:
(2) Collection receptacles. Upon removal from the permanent outer container, the collector shall seal it and promptly: