Subsection N1103.3.2 (R403.3.2) of the International Residential Code for One- and Two-Family Dwellings is hereby amended to read as follows:

N1103.3.2 (R403.3.2) Sealing (Mandatory). Ducts, air handlers, and filter boxes shall be sealed. Joints and seams shall comply with Section M1601.4.1 of this code.