All such registered policies or bonds of each kind and class issued shall have imprinted thereon some appropriate designating letter, combination of letters or terms identifying the special forms of contract, and whenever any change or modification is made in the forms of contracts, policy or bond, the designating letters or terms thereon shall be correspondingly changed.

18 Del. C. 1953, § ?2936; 56 Del. Laws, c. 380, § ?1;