Oklahoma Statute Title 2, Section 10-77 states:
It shall be a violation of this subarticle for any person other than those exempted in Section 10-77 of the Oklahoma Agricultural Code:
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8. To use a retail egg container more than one time;
The act also requires that graded eggs bear certain markings on the egg carton, which may explain the prohibition on reuse, but as drafted it seems a little over-inclusive.