Food on display, other than whole, unprocessed raw fruits and unprocessed raw vegetables, shall be protected from contamination by being packaged by display cases, by covered containers for self-service or by similar protective equipment except as provided in Subpart 271-8 of this Part. All food shall be displayed above the floor in a manner that will protect the food from contamination. Hot or cold food units shall be provided to assure the maintenance of potentially hazardous food at the required temperature during display. Potentially hazardous food except for raw, frozen shell-on shrimp or lobster, shall not be provided for consumer self-service except as provided in Subpart 271-8 of this Part. Bulk foods shall be dispensed only from product modules which are protected by close fitting, individual covers. Customer access to bulk food in product modules shall be limited and controlled to avoid the introduction of contaminants. Means considered suitable include but are not limited to: