Administrative Procedure (UAPA) - As enacted, generally prohibits a governmental agency from adopting a rule or establishing numeric criteria or numeric limitations applicable to a contaminant, pollutant, hazardous substance, solid waste, or hazardous waste that relates to drinking water, water pollution control, hazardous substances, contaminated site remediation, air quality, or solid or hazardous waste handling unless certain conditions are met. - Amends TCA Title 4, Chapter 5.

HB 896, the "Sound Science in Regulations Act," prohibits Tennessee environmental agencies from creating new rules on drinking water, air quality, hazardous substances, or waste handling unless they meet strict scientific standards. It requires agencies to base regulations on "best available science" that is reliable, unbiased, and published in peer-reviewed journals with independent verification. The law applies only to new rules stricter than federal standards, effective July 1, 2025, and excludes existing rules or those required by federal law. This directly affects agencies like the Tennessee Department of Environment and Conservation when developing new environmental regulations.