28 Tex. Admin. Code § 34.617
After completion of the installation, modification, or addition of a system or single station detector unit, except for a one-or-two-family residence, the licensee shall complete an installation certificate in the format provided by the state fire marshal in lieu of the installation form required by the adopted standard unless required otherwise by the local authority having jurisdiction. The format for the installation certificate shall be provided by the SFMO on request. The certificate shall be presented to the owner or the owner's representative or posted near the main control panel. The installation certificate shall identify the standards applicable to the installation and certify compliance with such standards, unless variance is permitted in § 34.616(b)(4) of this title (relating to Sales, Installation, and Service), in which event the specific variance and authority for such variance shall be identified. The information and format of the installation certificate shall be determined by the state fire marshal. When an installation certificate form has been completed, legible copies shall be distributed as follows:
28 Tex. Admin. Code § 34.617