Relevant bits in CA Page 37, you can serve unsafe food in California as long as you notify people doing so is unsafe. Though these are minimum legal requirements, you can still get sued over the practice.

“A raw animal food such as raw egg, raw fish, raw marinated fish, raw molluscan shellfish, or steak tartare, or a partially cooked food such as lightly cooked fish, soft cooked eggs, or rare meat other than whole-muscle, intact beef steaks as specified in subdivision (c), may be served or offered for sale upon consumer request or selection in a ready-to-eat form if either of the following conditions are satisfied: (1) All of the following requirements are met: (A) As specified in paragraph (1) or (2) of subdivision (e) of Section 114091, the food facility serves a population that is not a highly susceptible population. (B) The food, if served or offered for service by consumer selection from a children’s menu, does not contain comminuted meat. (C) The consumer is informed pursuant to Section 114093 to ensure its safety, the food should be cooked as specified in subdivision (a) or (b). (2) The department grants a variance from subdivision (a) or (b) pursuant to Section 114417 based on a HACCP plan that satisfies all of the following conditions: (A) It is submitted by the permitholder and approved pursuant to Sections 114417.1 and 114417.3. (B) It documents scientific data or other information showing that a lesser time and temperature regimen results in safe food. (C) It verifies that equipment and procedures for food prepared and training of food employees at the food facility meet the conditions of the variance.”

https://www.cdph.ca.gov/Programs/CEH/DFDCS/CDPH%20Document%2...