The duties of the Mayor shall be as follows:
(a) Insofar as required by statute, and for all ceremonial purposes, he shall be the executive head of the city;
(b) He shall have a voice and vote in the proceedings of the Commission equal with that of the other members of the Commission, but shall have no veto power. He shall be the presiding officer of the Commission.
(c) He shall be the conservator of the peace and may in emergencies exercise within the city the powers conferred upon sheriffs to suppress riot and disorder, and shall have the authority to command the assistance of all able-bodied citizens to aid in the enforcement of the ordinances of the city and to suppress riot and disorder.
(d) He shall execute or authenticate by his signature such instruments as the commission, this charter or any statute or law of the United States shall require.
(e) He shall exercise only such powers as this charter or the commission shall specifically confer upon him, except as may be required by statute.