7 Tex. Admin. Code § 152.15
(a) The persons granting or acknowledging the encumberance of their homestead interest must execute the contract for work and material used to repair or renovate existing improvements at the permanent physical address of:
(b) Execution of the contract may not occur at a mobile office located at:
Source Note:The provisions of this §152.15 adopted to be effective July 7, 2005, 30 TexReg 3863.