A life insurance company doing business in the State or an agent thereof shall not:
(1) issue a policy of insurance or make an agreement other than that plainly expressed in the policy issued to the insured;
(2) pay or allow, or offer to pay or allow, as an inducement to insurance, a rebate or premium payable on the policy;
(3) grant a special favor or advantage in the dividends or other benefits to accrue thereon; or
(4) provide any valuable consideration or inducement not specified in the policy.