(a) All businesses licensed pursuant to this article who employ security guards as that term is defined in General Business Law, article 7-A must maintain insurance as defined: all security guard companies other than public entities which are self-insured shall file with the department a certificate of insurance evidencing comprehensive general liability coverage from an insurance company licensed to do business in this State for death and personal injury, which coverage shall include false arrest or false imprisonment, malicious prosecution, libel, slander, and violation of right of privacy, in the minimum amount of $100,000 per occurrence and $300,000 in the aggregate. The certificate shall provide that the insurance shall not be modified or cancelled unless 30 days prior notice shall be given to the department.

(b) After the effective date of this article, no security guard company shall knowingly have in its employ a security guard unless such coverage is in force and such certificate is filed with the department. Public entities which are self-insured shall file a statement to that effect satisfactory to the secretary in lieu of a certificate of insurance.