Maryland Code, Insurance § 6-303

(a) When by or pursuant to the laws of any other state or foreign country any taxes, licenses and other fees other than fees similar to the assessment fee established under Title 2, Subtitle 5 of this article, in the aggregate, and any fines, penalties, deposit requirements or other material obligations, prohibitions or restrictions are or would be imposed upon Maryland insurers, or upon the insurance producers or representatives of such insurers, which are in excess of such taxes, licenses and other fees, in the aggregate, or which are in excess of the fines, penalties, deposit requirements or other obligations, prohibitions, or restrictions directly imposed upon similar insurers, or upon the insurance producers or representatives of such insurers, of such other state or country under the statutes of this State, so long as such laws of such other state or country continue in force or are so applied, the same taxes, licenses and other fees, in the aggregate, or fines, penalties or deposit requirements or other material obligations, prohibitions, or restrictions of whatever kind shall be imposed by the Commissioner upon the insurers, or upon the insurance producers or representatives of such insurers, of such other state or country doing business or seeking to do business in Maryland.

(b) For the purposes of this subtitle, any tax, license or other fee or other obligation imposed by a political subdivision or agency of another state or country upon Maryland insurers or their insurance producers or representatives shall be deemed to be imposed by that state or country.