Add the following to this section:

For the plumbing systems in Appendix C, other than those of C301.0, C302.0 and C501.0, the design by a registered professional engineer is required where the work is not exempted by AS 08.48.331. A riser diagram or isometric indicating the provisions of Appendix C intended to be installed shall be submitted for review and approval by the Building Department prior to the work being commenced. The riser diagram or isometric is in addition to the other details or data that may be required by the Building Official.