(a) Industrialized housing, buildings, and site-built REFs shall be constructed to meet or exceed the mandatory building code standards and requirements referenced in §70.100 and §70.101 in effect at the time of construction. A building that has not been previously occupied or used for its intended purpose shall comply with the provisions of the mandatory building codes referenced in §70.100 and §70.101 for new construction in effect at the time of construction. Industrialized housing and buildings shall be installed in accordance with the mandatory building code standards and requirements referenced in §70.100 and §70.101.     
      (b) Alterations of industrialized housing and permanent industrialized buildings shall be in accordance with §70.74 and shall comply with the provisions of the codes referenced in §70.100 and §70.101 for new structures.     
      (c) Industrialized buildings designed to be moved from one commercial site to another commercial site shall be recertified or altered in accordance with the mandatory building code standards and requirements referenced in §70.100 and §70.101 and in accordance with §70.74. Alterations of buildings shall comply with the standards and requirements of the following codes for each type of recertification class.      
        (1) Recertification class 1 and class 4: Alterations shall comply with the International Existing Building Code as referenced in §70.101. Alterations of buildings that have not been previously occupied or used for their intended purpose shall comply with the provisions of the codes referenced in §70.100 and §70.101 for new construction.       
        (2) Recertification class 2 and class 3: The existing building as altered, and additional alterations to the building, shall comply with the provisions of the International Existing Building Code as referenced in §70.101.       
      (d) The codes adopted in §70.100 and §70.101 shall be construed to conform to the intent of Chapter 1202 and these rules and regulations. For example, where reference is made in any of the codes to the building official, the plumbing or mechanical official, or the administrative authority or enforcement official, such reference shall be construed pursuant to Chapter 1202 and the sections in this chapter to mean, where applicable, the council, the local building official, or the department.     
     Source Note:        The provisions of this §70.102 adopted to be effective April 13, 1990, 15 TexReg 1787; amended to be effective May 17, 2004, 29 TexReg 4867; amended to be effective May 1, 2005, 30 TexReg 2504; amended to be effective January 1, 2010, 34 TexReg 9409