The Commissioner may grant exemptions from any of the requirements of this article except those requirements governed by the California Air Resources Board when, in his judgement, the request appears reasonable or the results intended by these regulations can be accomplished by alternate methods of compliance. However, no exemption will be granted if, in the opinion of the Commissioner, the exemption would compromise the safety requirements of these regulations. In addition, any exemption granted by the Commissioner is nontransferable and may be rescinded at any time for cause. The California Highway Patrol shall within 90 days of receiving a request for exemption, respond in writing informing the requesting party whether the exemption has been denied or granted. The reason(s) for denial of the request will be included in the written response and the California Highway Patrol's decision is final. No exemptions will be given for motor vehicles manufactured after the effective date of Federal Motor Vehicle Safety Standards addressing gaseous fuel systems.