United States
Hong KongBuffets and self-service: shields, clean plates, and supervision
Self-service areas need food shields, utensils with handles kept out of the food, a clean plate for each return trip, and monitoring by a member of staff. Food that has been out for self-service is not returned to the line.
A buffet hands control of the food to people who have not been trained, which is why the Code compensates with structure and supervision.
Food shields
Also called sneeze guards. Positioned to intercept the direct line between a customer's mouth and the food.
Height matters, and so does the customer. A shield sized for adults leaves food exposed at a children's party, which is the version of this that appears in scenario questions.
Clean plate each time
A customer returning to the line takes a fresh plate. The used one goes.
The reason is that the plate has been in contact with a mouth, by way of cutlery, and it is about to be held over open food. Signage and stacked clean plates at the start of the line are how this is enforced in practice.
Food removed from the line does not return to it. Neither do unwrapped condiments, bread from a basket, or garnish on a returned plate. The only things reusable are items that were packaged and stayed packaged.
Utensils
One per dish, with the handle out of the food, resting on a clean surface or in the food with the handle above the surface line.
Changed regularly, and immediately if dropped or misused. A serving spoon that has been used for two dishes is a cross-contamination question and, where an allergen is involved, a cross-contact one.
Temperature
Hot at 57°C (135°F) or above, cold at 5°C (41°F) or below, checked and recorded through service rather than at setup only.
Where equipment cannot hold temperature - an outdoor event, a long reception - time as a public health control is the alternative, with the food marked and discarded at four hours.
Supervision
A member of staff monitoring the line, not merely nominally responsible for it.
That person notices the customer reusing a plate, the child reaching under the shield, the utensil that has migrated to the wrong dish, and the pan that has dropped below temperature. All four are things no amount of signage catches.
Raw food on a self-service line
Where customers cook their own - a hotpot or grill format - raw and ready-to-eat are kept separate, separate utensils and plates are provided for raw items, and the consumer advisory applies.
And in an establishment serving a highly susceptible population, raw or undercooked animal food is not offered at all, self-service or otherwise.
Common questions
Do buffets need sneeze guards?
Yes - food shields positioned to intercept the direct line between a customer's mouth and the food. Height has to suit the customers, which is why a children's event needs different provision.
Can customers reuse their plate at a buffet?
No. A clean plate is taken for each return trip, because the used plate has been in contact with a mouth by way of cutlery and is about to be held over open food.
Can buffet food be returned to the line?
No. Food removed from the line does not go back, and neither do unwrapped condiments, bread from a basket, or garnish on a returned plate. Only items that stayed packaged are reusable.
How should serving utensils be stored?
One per dish, with the handle kept out of the food - either on a clean surface or in the food with the handle above the surface line. Changed regularly and immediately if dropped.
What if buffet equipment cannot hold temperature?
Time as a public health control is the alternative: the food is marked and discarded at four hours. That is a decision made in advance, not a fallback discovered during service.