The bill mandates that any rules or regulations established by state departments, local authorities, or commissions regarding greenhouse gas emissions or the calculation and application of the social cost of carbon will not take effect unless they receive approval from the legislature during the next legislative session. This requirement applies to rules related to the operation of motor vehicles and is intended to ensure legislative oversight over environmental regulations.

The bill introduces several new sections that outline this requirement, specifically targeting rules from various departments and boards. Each section is designed to be codified into existing legal frameworks, ensuring that the provisions are integrated into the relevant titles and chapters of Montana law. This legislative approval process aims to enhance accountability and transparency in the regulation of greenhouse gas emissions and related environmental policies.