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The 2018 International Existing Building Code (IEBC) is included in the adoption of the International Building Code as provided by IBC Section 101.4.7 and amended in WAC 51-50-480000, including Appendix A, Guidelines for the Seismic Retrofit of Existing Buildings, excluding Chapter 1, Part 2, Administration. The Construction Administrative Code, as set forth in Chapter 17.14 MICC, shall be used in place of IEBC Chapter 1, Part 2, Administration. Provided that detached one- and two-family dwellings and multiple single-family dwellings (townhouses) not more than three stories above grade plane in height with a separate means of egress, and their accessory structures not more than three stories above grade plane in height, shall comply with this code or the International Residential Code. (Ord. 21C-01 § 1 (Exh. A)).