The area manager of a Commonwealth explosives area may determine and, by signs prominently displayed, indicate:

(a)

places in the area where a person is, or is not, permitted to park or stop a vehicle or a class of vehicles or to moor or stop a vessel or a class of vessels; and

(b)

the conditions under which a person is, or is not, permitted to park or stop a vehicle or a class of vehicles, or to moor or stop a vessel or a class of vessels, in those places; and

(c)

the maximum speed for a vehicle or vessel, or a class of vehicles or vessels, in all or part of the area.