Illinois Statutes Chapter 215. Insurance § 5/534.5. Member company

(a) a domestic insurance company formed before or after the effective date of this Article; or

(b) a foreign or alien insurance company.

An insurance company shall cease to be a member company effective on the day following the termination or expiration of its license to transact the kinds of insurance to which this Article applies; provided, however, that the insurance company shall remain liable as a member company for any and all obligations, including obligations for assessments levied before the termination or expiration of the insurance company's license and assessments levied after the termination or expiration, based on any insolvency as to which the determination of insolvency by a court of competent jurisdiction occurs before the termination or expiration of the insurance company's license.