(a) The Mayor may, in case of riot, looting, insurrection or other civil disturbance, or when there is clear and present danger of riot, looting, insurrection or other civil disturbance, proclaim in writing a state of emergency.
(b) As part of the proclamation or by subsequent written order after the proclamation is issued, the Mayor may, in his discretion as he believes necessary for public safety:
(1) Delineate the boundaries of any area threatened by riot, looting, insurrection or other civil disturbance and restrict or prohibit the movement of persons or vehicles into, from or within such area;
(2) Establish a curfew within such area and prohibit persons from being out of doors during such curfew;
(3) Prohibit the sale, offering for sale, dispensing and transportation of firearms and other deadly weapons, ammunition, dynamite and other dangerous explosives, incendiary devices and any necessary ingredient thereof; and
(4) Issue reasonable regulations to suppress such riot, looting, insurrection or other civil disturbance or to protect persons or property from harm by reason of such riot or insurrection.
(c) When the danger from riot, looting, insurrection or other civil disturbance has passed, the Mayor shall forthwith make proclamation that the emergency has ended and any proclamation, order or regulation issued pursuant to this section shall then become void.
(d) The powers conferred by this section are in addition to any other powers which may be conferred by law and nothing in this section shall be construed to modify or limit such authority, powers, duties or responsibilities of any officer or public official, as may be provided by law. Nothing in this section shall be construed to permit suspension of the right to a writ of habeas corpus.