The key statutory tool is §14-303 of Title 14. Having previously declared a state of emergency,
(b) After proclaiming a state of emergency, the Governor may
promulgate reasonable orders, rules, or regulations that the Governor
considers necessary to protect life and property or calculated
effectively to control and terminate the public emergency in the
emergency area, including orders, rules, or regulations to:
...
(2) designate specific zones in the emergency area in which the
occupancy and use of buildings and vehicles may be controlled;
(3) control the movement of individuals or vehicles into, in, or from
the designated zones;
(4) control places of amusement and places of assembly;