California Code, Health and Safety Code - HSC § 114060

(a) Except for nuts in the shell and whole raw fruits and vegetables that are intended for hulling, peeling, or washing by the consumer before consumption, food on display shall be protected from contamination by the use of packaging, counter, service line, or sneeze guards that intercept a direct line between the consumer's mouth and the food being displayed, containers with tight-fitting securely attached lids, display cases, mechanical dispensers, or other effective means.

(b) Nonprepackaged food may be displayed and sold in bulk in other than self-service containers if both of the following conditions are satisfied: