Administrative rules; adopting environmental protection criteria stricter than federal requirements prohibited

Added a new requirement that rules protecting human health must establish a direct causal link between exposure and actual physical injury or disease, rather than just an increased risk.

Expanded the definition of 'Best Available Science' to include specific criteria for data quality and study types.

Redefined 'Generally Accepted Scientific or Technical Practices' to require that methods be tested for reliability and validity.

Added a detailed definition for 'Refereed Journal' to ensure only publications with rigorous, nonpartisan review processes are considered valid sources.

Added a new definition for 'Manifest Bodily Harm' to clarify that rules cannot be based solely on the presence of a substance or an increased risk of disease.