Section 17. Legislation procedure. —

The Board shall hold two ordinary sessions for the transaction of business during each week on days which it shall fix by resolution, and such extraordinary sessions, as may be called by the Mayor. It shall sit with open doors unless otherwise ordered by an affirmative vote of the majority of all the members. It shall keep a record of its proceeding and determine its rules of procedure not herein set forth. A majority of all the members of the Board shall constitute a quorum for the transaction of business, and the affirmative votes of a majority of all the members shall be necessary for the passage of any ordinance or resolution. Ordinary motions may be approved by a majority of those present. The ayes and nays shall be taken and recorded upon the passage of all ordinances, upon all resolutions or motions directing the payment of money or creating liability, and, at the request of any member, upon any other resolution or motion. Each proposed ordinance shall be published in two daily newspapers of general circulation in the City, and shall not be discussed or enacted by the Board until after the third day following such publication. Each ordinance enacted by the Board, and each resolution or motion directing the payment of money or creating liability, shall be forwarded to the Mayor for his approval. Within ten days after the receipt of the ordinance, resolution or motion, the Mayor shall return it with his approval or veto. If he does not return it within that time, it shall be deemed to be approved. If he returns it with his veto, his reasons therefor in writing shall accompany it. It may then be again enacted by the affirmative votes of two-thirds of all members of the Board, and again forwarded to the Mayor for his approval, and if within ten days after its receipt he does not again return it with his veto, it shall be deemed to be approved. If within said time he again returns it with his veto, it shall be forwarded forthwith to the President for his approval or disapproval, which shall be final. The Mayor shall have the power to veto any particular item or items of an appropriation ordinance, or of an ordinance, resolution or motion directing the payment of money or creating liability, but the veto shall not affect the item or items to which he does not object. The item or items objected to shall not take effect except in the manner heretofore provided in this section as to ordinances, resolutions and motions returned to the board with his veto. Each approved ordinance shall be sealed with the city seal, signed by the presiding officer and the secretary, and recorded in a book kept for the purpose; shall be published in two daily newspapers of general circulation in the city, within ten days after its approval; and shall take effect and be in force on and after the twentieth day following its publication, if no date is fixed in the ordinance.