CA SB465

Changes the definition of "nonfunctional slack fill" from "less than capacity" to "substantially less than capacity" across packaging and labeling laws in Business and Professions Code and Health and Safety Code.

Establishes that slack fill in a package cannot be used alone to allege a violation unless it is specifically nonfunctional slack fill, providing 15 specific exemptions including product protection, labeling requirements, decorative containers, and visibility of product dimensions.

Applies different standards for food containers subject to federal law, with 6 exemptions tailored to food packaging and requiring consistency with federal Food and Drug Administration regulations in Title 21 of the Code of Federal Regulations.

Clarifies that for food containers, state provisions are operative only to the extent they are identical to federal requirements under Section 403(d) of the Federal Food, Drug, and Cosmetic Act.

Maintains enforcement authority for sealers to seize violative containers and provides for court proceedings to condemn or destroy seized containers or return contents to owners.