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Utah's State Construction Code would be updated to replace the outdated 2006 Utah Wildland Urban Interface Code with the 2024 International Wildland-Urban Interface Code, which sets building standards for homes and structures in areas where development meets wildfire-prone forest or grassland; this version also deletes a section of that code dealing with fire apparatus access roads and adds language tying the designation of wildland-urban interface areas to a state wildfire risk mapping tool, unless the Division of Forestry, Fire, and State Lands approves an exception. The bill would delay from January 2026 to January 2027 the start date for the annual fee county officers must assess against owners of high-risk wildland-urban interface properties. It would also require the division to share its wildfire risk assessment maps with counties, give counties 30 days to recommend changes to those maps, and then either adopt the county's recommendations, explain in writing why it modified them, or explain in writing why it rejected them. Compared to the original version of the bill, this substitute adds the new mapping-tool risk-threshold requirement and the deletion of the fire access road provision, while keeping the fee delay and county mapping input process largely the same.