Quiz Show - Can you reuse shells for food products other than the original inhabitant?

These local scallop and razor clam shells had been washed, rinsed and sanitized and were ready for use. The chef was planning on using them as the serving vessel. Is that allowed by code?

Nope. The reuse of mollusk and crustacean shells beyond their original use with the original animal is not allowed in food establishments even if the shells are washed, rinsed, and sanitized. This prohibition does not apply to the removal of the oyster or other species from the shell for preparation, then returning the same animal to the same shell for service. Although darn pretty, they can only be used for decoration, not in direct contact with food.