The 2015 International Swimming Pool and Spa Code (ISPSC) is included in the adoption of the International Building Code as provided by IBC Section 3109.1 and amended in WAC 51-50-3109, excluding Chapter 1, and is adopted. The design and construction of swimming pools, spas and other aquatic recreation facilities shall comply with the ISPSC, where the facility is one of the following, except that public swimming pool barriers are regulated by WAC 246-260-031(4):
A. For the sole use of residents and invited guests at a single-family dwelling;
B. For the sole purposes of residents and invited guests of a duplex owned by the residents; or
C. Operated exclusively for physical therapy or rehabilitation and under the supervision of a licensed medical practitioner.