Md. Code, Business Occupations and Professions § 7–303

An individual who is licensed to practice forestry in another state or country may practice forestry in this State without a license if:

(1) the state or country in which the individual is licensed waives the license requirements for licensees of this State to a similar extent as this State waives the license requirements for individuals licensed in that state or country;

(2) the individual submits to the Board evidence that the individual is licensed in the other state or country; and

(3) the individual:

(i) is not a resident of this State and does not maintain a place of business in this State; or

(ii) has become a resident of this State within the preceding 6 months.