Maryland Insurance Section 9-208
§ 9-208.
  A delinquency proceeding may be brought against:
    (1)   an insurer that is doing or has done insurance business in the State and against whom claims arising from that insurance business may exist now or in the future;
    (2)   a person that purports to do insurance business in the State;
    (3)   an insurer that has insureds resident or located in the State;
    (4)   a person organized, or in the process of organizing, with intent to do insurance business in the State;
    (5)   a corporation that operates a nonprofit health service plan under Title 14, Subtitle 1 of this article; and
    (6)   a person that does, or has done, any of the acts of an insurance business specified in § 4-205 of this article.