Selling homemade food? Check California's cottage food label rules
California cottage food operations have their own label requirements. The University of California's cottage food guide lists them, including the words “Made in a Home Kitchen” (or “Repackaged in a Home Kitchen”) in 12-point type on the principal display panel, the operation's registration or permit number with the name of the local agency that issued it, the ingredients, and the net quantity in both US and metric units. Check the current requirements with your local environmental health agency before you print. CatalogProFlow and print shops don't review labels for compliance.
Source: UC Agriculture and Natural Resources: cottage food label requirements