Cal. Code Regs. tit. 19 § 1213
The sample of standard fabric shall then be submitted to an approved laboratory, together with sufficient chemical to treat at least five yards of the fabric, and the necessary instructions for its proper application. The chemical shall be applied as per instructions, by a member of the laboratory staff, or may be applied by the person submitting the chemical in the presence of a member of the laboratory staff or a representative of the State Fire Marshal's Office. If the applicant so desires he may treat the test sample in his flame-retardant application plant in the presence of either the laboratory staff member or a representative of the State Fire Marshal. (See note.) Exterior chemicals shall be khaki color for testing.
Cal. Code Regs. Tit. 19, § 1213