(a) Records to be retained. The installer must retain:
- (1) A record of the name and address of the purchaser or other person with whom the installer contracted for the installation work and the address of the home installed;
- (2) A copy of the contract pursuant to which the installer performed the installation work;
- (3) A copy of any notice from an inspector disapproving the installation work;
- (4) A copy of the qualified inspector's verification of the installation work;
- (5) A copy of the installer's certification of completion of installation in accordance with the requirements of this part; and
- (6) A copy of foundation designs used to install the home, if different from the designs provided by the manufacturer, including evidence that the foundation designs and instructions were certified by a professional engineer or registered architect, including the name, address, and telephone number of the professional engineer or architect certifying the designs.