When any chemical, preservative, cereal, spice or other substance is intended for use in an official establishment, it shall be examined by a department employee and if found to be unfit or otherwise unacceptable for the use intended, or if final decision regarding acceptance is deferred pending laboratory or other examination, the employee shall attach a “NYSDA&M Retained” tag to the substance or container thereof. The substance so tagged shall be kept separate from other substances as the officer in charge may require and shall not be used until the tag is removed, and such removal shall be made only by a department employee after a finding that the substance can be accepted, or, in the case of an unacceptable substance, when it is removed from the establishment.