An Act amending the act of June 5, 1968 (P. L. 140, No. 78), entitled "An act regulating the writing, cancellation of or refusal to renew policies of automobile insurance; and imposing powers and duties on the Insurance Commissioner therefor," prohibiting certain surcharges or rate increases on the rates of private vehicles of professional drivers and prohibiting cancellation of policies or rate increases on the basis of an accident record when the insured was not at fault.