Cal. Code Regs. tit. 19 § 1321
After every job of flame retardant chemical application by a registered flame-retardant application concern, an approved certificate of flame resistance shall be furnished the person or concern for whom the work was done, and copies sent the State Fire Marshal and the local fire authority. These certificates shall be delivered within 10 days after completion of the job, shall be filled out completely and signed by an authorized representative of the registered application concern.
Notation shall be made on the reverse side of the certificate indicating the kind of material and color, and, where curtains or drapes are treated, whether they are unlined, lined, or lined and interlined. Whenever possible the location and use of the treated articles should be given also.
This section shall apply only in cases where treated fabrics are intended for use or may sometimes be used in the State of California.
Cal. Code Regs. Tit. 19, § 1321