Md. Code, Health - General § 18–212.1

If the Governor has strong grounds to believe that there is a danger of a malignant and contagious disease being introduced into the State, the Governor may:

(1) Quarantine a vessel that is entering the waters of the State;

(2) Prohibit or restrict contact between the State and the place affected by the disease; and

(3) Take other actions that appear to the Governor to be necessary to carry out this section.