This bill introduces a new section to RSA 265, specifically section 75-a, which prohibits the operation of diesel-powered motor vehicles with a manufacturer's gross vehicle weight rating under 18,000 pounds if they emit visible smoke on public ways or parking areas due to alterations in the exhaust or emission control systems, commonly referred to as "rolling coal." The bill establishes that individuals who violate this prohibition will be guilty of a violation. The effective date for this new regulation is set for January 1, 2026.

In terms of fiscal impact, the bill is expected to have indeterminable expenditures for both state and local governments, as it may influence the judicial and correctional systems due to the introduction of penalties for violations. However, there are no anticipated changes in revenue for the state or counties as a result of this bill. The agencies contacted regarding the bill include the Judicial Branch, Department of Justice, and Department of Corrections, among others, to assess the potential implications of the new regulations.