(b) The mayor, within ten calendar days of receipt of an ordinance, shall return it to the clerk with or without the mayor's approval, or with the mayor's disapproval. If the ordinance has been approved by the mayor, it shall become law upon its return to the clerk; if the ordinance is neither approved nor disapproved, it shall become law at 12:00 Noon on the tenth calendar day after its adoption; if the ordinance is disapproved, the mayor shall submit to the city council through the clerk a written statement of the reasons for the veto. The clerk shall record upon the ordinance the date of its delivery to and receipt from the mayor.

(c) Ordinances vetoed by the mayor shall be presented by the clerk to the city council at its next meeting. If the city council then or at its next meeting adopts the ordinance by an affirmative vote of four members, it shall become law.

(d) The mayor may disapprove or reduce any item or items of appropriation in any ordinance. The approved part or parts of any ordinance making appropriations shall become law, and the part or parts disapproved shall not become law unless subsequently passed by the city council over the mayor's veto as provided herein. The reduced part or parts shall be presented to the city council as though disapproved and shall not become law unless overridden by the council as provided in subsection (c) of this section.