The Department is authorized to destroy:

1. (1) Any official sample when it determines that no analysis of such sample will be made.
2. (2) Any official sample or part thereof when it determines that no case under the act, is or will be based on such sample.
3. (3) Any official sample of part thereof when the sample was the basis of a case under the act which has gone to final judgment, and when it determines that no other such case is or will be based on such sample.
4. (4) Any official sample or part thereof if the article is perishable.
5. (5) Any official sample or part thereof, when, after collection, such sample or part has become decomposed or otherwise unfit for analysis.
6. (6) That part of any official sample which is in excess of three times the quantity it estimates to be sufficient for analysis.