The mayor shall be the chief executive officer of the municipality. He shall supervise the administration of the affairs of the municipality and shall exercise control over all departments and divisions thereof. He shall be the chief conservator of the peace within the municipality and shall cause all laws and ordinances to be enforced therein.
   He shall be responsible for the preparation and submission of the annual estimate of receipts and expenditures and of appropriation measures and for furnishing to the council full information on the financial condition and needs of the municipality. He shall be responsible for the faithful observance and performance of the conditions imposed in favor of the municipality or its inhabitants by any franchise or contract to which the municipality is a party.
   Except as otherwise provided by this charter, the mayor shall have the power to appoint, promote, transfer, suspend, reduce or remove any officer or any nonelected employee of the municipality.