Each domestic Lloyds shall at all times keep and maintain in this State admitted assets, including the deposits of underwriters required by section 97, exceeding all outstanding claims and other liabilities plus the unearned premiums (less reinsurance premiums) on the policies in force, by not less than $900,000 if such Lloyds is writing all or any kinds of insurance enumerated in Class 2 of section 4, by not less than $600,000 if such Lloyds is writing all or any kinds of insurance enumerated in Class 3 of section 4 and by not less than $1,500,000 if such Lloyds is writing the kinds of insurance enumerated in both Class 2 and Class 3 of section 4, provided however, that any such Lloyds organized prior to the effective date of this amendatory Act of 1965 shall have and at all times maintain admitted assets in excess of all liabilities in the amount which was required for that particular Lloyds at the time it was issued a certificate of authority.