(c) No person shall sell, offer for sale, or use in construction of buildings subject to this part, mobilehomes subject to Part 2 (commencing with Section 18000), or factory-built housing subject to Part 6 (commencing with Section 19960), in this state, any foam building system, and no person shall sell or offer for sale in this state any such building, mobilehome, or factory-built housing of which a foam building system is a component, which foam building system does not comply with, or has not been listed and labeled by an approved testing agency certifying that the foam building system is in compliance with, the requirements of subdivision (a) on and after the 180th day after the building standards or other rules or regulations become effective.

This subdivision shall not apply to any buildings, mobilehomes, or factory-built housing constructed prior to the 180th day after those standards become effective.

(e) As used in this section:

1. (1) “Foam” means a material made by mixing organic polymers with air or other gases in a manner that forms a solid substance with holes filled with air or gas when the mixture is allowed to set.
2. (2) “Foam building system” means a system of building materials composed of, in whole or in part, of foam. It includes, but is not limited to, all combinations of systems such as those composed of foam inserted between and bonded to two boundary surface materials or those composed exclusively of foam.
3. (3) “Building standard” means building standard as defined in Section 18909.