Section 1793 - Special provisions relating to premiums(a) Limitation on premium increases.--(1) An insurer shall not increase the premium rate of an owner of a policy of insurance subject to this chapter solely because one or more of the insureds under the policy made a claim under the policy and was paid thereon unless it is determined that the insured was at fault in contributing to the accident giving rise to the claim.(2) No insurer shall charge an insured who has been convicted of a violation of an offense enumerated in section 1535 (relating to schedule of convictions and points) a higher rate for a policy of insurance solely on account of the conviction. An insurer may charge an insured a higher rate for a policy of insurance if a claim is made under paragraph (1).(b) Surcharge disclosure plan.--All insurers shall provide to the insured a surcharge disclosure plan. The insurer providing the surcharge disclosure plan shall detail the provisions of the plan including, but not limited to: (1) A description of conditions that would assess a premium surcharge to an insured along with the estimated increase of the surcharge per policy period per policyholder.(2) The number of years any surcharge will be in effect. The surcharge disclosure plan shall be delivered to each insured by the insurer at least once annually. Additionally, the surcharge information plan shall be given to each prospective insured at the time application is made for motor vehicle insurance coverage.(c) Return of premiums of canceled policies.--When an insurer cancels a motor vehicle insurance policy which is subject to section 6(3) of the act of June 5, 1968 (P.L. 140, No. 78), relating to writing, cancellation of or refusal to renew policies of automobile insurance, the insurer shall within 30 days of canceling the policy return to the insured all premiums paid under the policy less any proration for the period the policy was in effect. Premiums are overdue if not paid to the insured within 30 days after canceling the policy. Overdue return premiums shall bear interest at the rate of 12% per annum from the date the return premium became due.(d) Rules and regulations.--The Insurance Department shall promulgate rules and regulations establishing guidelines and procedures for determining fault of an insured for the purpose of subsection (a) and guidelines for the content and format of the surcharge disclosure plan. 1984, Feb. 12, P.L. 26, No. 11, § 3, effective 10/1/1984.