(a) The scope of this chapter is limited by Chapter 1202; accordingly, it does not apply to:(1) mobile homes or HUD-code manufactured homes as defined in Texas Occupations Code, Chapter 1201;(2) housing or buildings:(A) of open construction;(B) that are constructed of sectional or panelized systems not utilizing modular components; or(C) that are built of modules or modular components that are constructed at the installation site.(D) Exception: Relocatable educational facilities purchased or leased on or after January 1, 2010 are required to be certified regardless of where the facility is built.(3) ready-built homes which are constructed so that the entire living area is contained in a single unit or section at a temporary location for the purpose of selling it and moving it to another location, provided that modular components are not used in the construction of the ready-built home. A temporary location would include a lumber yard, a vacant lot, or other similar area that is not used exclusively for the construction of buildings;(4) a commercial building or structure that is:(A) installed in a manner other than on a permanent foundation; and(B) either:(i) is not open to the public; or(ii) is less than 1,500 square feet in total area and used other than as a school or a place of religious worship;(5) buildings that are specifically referenced in the mandatory building codes as exempt from permits; or(6) construction site buildings.(b) The installation of an industrialized house or a permanent industrialized building that is moved from the first installation site to a new installation site is subject to the permitting and approval requirements of the local authorities.