9 CFR 590.418 - Supervision of marking and packaging.
(a) Evidence of label approval. No inspector shall authorize the use of official identification on any inspected product unless he has on file evidence that such official identification or packaging material bearing such official identification has been approved in accordance with the provisions of § 590.411.
(b) Affixing of official identification. No official identification shall be, or caused to be affixed to or placed on any product or container except by an inspector or under the supervision of an inspector or other person authorized by the Administrator. All such products shall have been inspected in accordance with these regulations. The inspector shall have supervision over the use and handling of all material bearing any official identification.
(c) Labels for products sold under Government contract. The inspector in the official plant may approve use of labels for containers of product sold under a contract specification to governmental agencies when such product is not offered for resale to the general public: Provided, That the contract specifications have been approved by the Administrator and include complete specific requirements with respect to labeling and are made available to the inspector.