No insurer may increase the premium or rate of an insured at policy issuance, during the term of a policy, or at renewal because of an accident if the insured was lawfully engaged in the performance of official duties as a law enforcement officer, firefighter, emergency medical technician, or operator of emergency snow removal equipment, if the operation of the emergency snow removal equipment is in response to a request from and in support of a law enforcement officer, firefighter, or emergency medical technician for any accident:
This section is not applicable to commercial lines policies. Any premium or rate increase in violation of this section, which is made erroneously and does not constitute a continuing business practice of the insurer, may not be the basis of any disciplinary action by the division against the insurer if the insurer refunds any excess premium promptly upon discovery of the error or upon request by the insured.
SDCL 58-24-75