Cal. Health and Safety Code § 122382

(a) Each permanent or fixed and temporary enclosure shall comply with all of the following standards: (1) Be structurally sound and maintained in good repair to protect the enclosed pet from injury, to contain the pet, to keep other animals out, and to promote the health and well-being of the pet. (2) Be maintained in a comfortable and sanitary manner. When being cleaned in a manner or with a substance that is or may be harmful to a pet within the enclosure, that pet shall be removed from the enclosure. (3) Be constructed of material suitable for regular cleaning and sanitizing. (4) As needed to ensure the comfort and well-being of the pet, provide heating, cooling, lighting, ventilation, shade, and protection from the elements, including, but not limited to, the sun, wind, rain, and snow. (5) Allow a pet to turn around freely, stand easily, and sit or lie down in a comfortable position. (b) Each enclosure is either a permanent or fixed enclosure or a temporary enclosure. (c) In addition to the requirements set forth in subdivision (a), a permanent or fixed enclosure for a cat shall provide an elevated platform appropriate for the size of the cat. (d) A pet may be contained in a temporary enclosure for a period not to exceed 4 hours during the day and 12 hours at night or the length of time that is humane for that particular pet, whichever is less. However, the pet shall remain outside the temporary enclosure for no less than the amount of time needed for the pet to eliminate its waste.