No profits out of a Lloyds Plan insurance operation shall accrue to an underwriter or underwriters except on the basis of his or their actual investment in cash or eligible securities, and no such profits shall be paid except out of surplus and in proportion to such investment. Such surplus shall be determined by the superintendent in the following manner:
A. he shall charge as liabilities the same reserves as are required of authorized stock insurers transacting the same kind of insurance;
B. he shall allow the surplus deposits of underwriters as an asset, except that if an underwriter's premium deposit is due and unpaid for ninety (90) days, the premium deposit shall first be charged against such surplus;
C. the surplus deposits of underwriters shall not be charged as liabilities;
D. all premium deposits due and unpaid for a period not exceeding ninety (90) days shall be allowed as assets; and
E. the amount of surplus shall otherwise be determined in accordance with similar determination, as applicable, of the surplus of other authorized stock and mutual insurers.