(a) No advertisement may state a premium for a policy that does not apply to the exact coverage advertised.(b) If a premium is quoted in an advertisement that does not apply to all classes of risk solicited, the class or classes to which it applies must be identified.(c) Advertisements referencing optional endorsements, riders or other benefits available at an additional cost, shall disclose the fact of additional cost.(d) Invitation to contract advertisements which provide specific premiums and advertise an endorsement, rider or other optional benefit which may be added to the policy advertised at an additional cost must separately disclose the additional premium required for each such endorsement, rider or other optional benefit.(e) Advertisements dealing with the availability of credit card billing of premiums must disclose that such method of billing is clearly optional to the purchaser.(f) If an invitation to contract advertisement contains the specific or estimated cost of the coverage and the rate charged may be changed by the insurer prior to the renewal of the policy, the advertisement must disclose that fact.