Md. Code, Insurance § 4–208

(a) This section does not apply to:

(1) lawfully procured surplus lines insurance; or

(2) insurance contracts that are independently procured through negotiations occurring entirely outside of the State and that are reported and on which the premium tax is paid under §§ 4-210 and 4-211 of this subtitle.

(b) An unauthorized insurer may not enforce an insurance contract effective in the State and entered into by the unauthorized insurer.