Motor vehicles; creating the Oklahoma Diesel Engine Freedom Act. Emergency.

SB 2078, the Oklahoma Diesel Engine Freedom Act, declares federal mandates requiring diesel exhaust fluid for vehicles operating solely within Oklahoma void, asserting the state's authority under the 10th Amendment to regulate intrastate emissions. It allows the manufacture, sale, and use of diesel engines not requiring exhaust fluid within Oklahoma, prohibits state agencies from enforcing federal diesel fluid requirements, and imposes fines up to $2,500 for violations. The bill repeals an existing Oklahoma statute (47 O.S. 2021, Section 12-423) related to emission control systems. It applies specifically to vehicles engaged only in intrastate commerce, not interstate travel.