(a) Except to the extent provided for in an applicable filing with the Commissioner then in effect, no insurer, general agent, agent, broker, or solicitor shall, as an inducement to insurance, or after insurance has been effected, directly or indirectly, offer, promise, allow, give, set off, or pay to the insured or to any employee of the insured, any rebate, discount, abatement, or reduction of premium or any part thereof named in any insurance contract, or any commission thereof, or earnings, profits, dividends, or other benefit, or any other valuable consideration or inducement whatsoever which is not expressly provided for in the policy.
(b) Subsection (a) of this section shall not apply as to commissions paid to a licensed agent, general agent, broker, or solicitor for insurance placed on his own property risks, if the aggregate of such commissions does not exceed 5 percent of the total net commissions received by the agent, general agent, broker, or solicitor during the same 12-month period.
(c) This section shall not apply to the allowance by any marine insurer, or marine insurance agent, general agent, broker, or solicitor, to any insured, in connection with marine insurance, of such discount as is sanctioned by custom among marine insurers as being additional to the agent's or broker's commission.