An insured or prospective insured who has reason to believe himself aggrieved, by a premium differential assigned to his policy rate, may protest such assigned differential by the means hereinafter specified. If the insured or potential insured elects to proceed under the means hereinafter specified, he shall be deemed to have elected such means as the exclusive means for challenging such differential, and to have relinquished any and all other rights to offer any challenge he may have possessed, whether at common law or otherwise.