Provides that, where a proposed critical area ordinance is based upon science that has yet to be replicated in a physical context similar to the one at issue, but is theoretically sound and otherwise meets the test for best available science, that science constitutes the best available science.

Declares that the requirement to consider the best available science under this act does not obligate a county or city to use science from a different physical context if the county or city determines that the science is not applicable to a specific local situation or physical context, even if it is the only available science.

Declares that the requirement to consider the best available science is a procedural, not substantive, requirement.