(A) Each producer and processor shall maintain shell eggs in refrigeration at an ambient temperature that does not exceed forty-five degrees Fahrenheit.

(B) Each food processor, distributor, and owner or operator of a food service establishment, retail food store, or other food establishment shall maintain any shell eggs intended for sale or distribution in refrigeration at an ambient temperature that does not exceed forty-five degrees Fahrenheit from the time the shell eggs are received by him until the time they are sold or distributed.

(C) The owner or operator of a premises where shell eggs are required to be maintained in refrigeration shall have in use at all times a thermometer, graduated in degrees Fahrenheit, that clearly indicates the ambient temperature at which the shell eggs are being maintained.