(1) All business of the commission shall be transacted by motion and resolution which may be made by any commissioner in attendance, including the chairman, and shall not require a second.

(2) Voting on all motions and resolutions shall be viva voce, unless a division is called for by any commissioner, in which case the secretary, or recording secretary, shall call the roll in alphabetical order and record the vote of each commissioner present, "yea" or "nay."

(3) A concurrence of the majority of the persons holding the office of commissioner at the time shall be necessary and shall be sufficient for the passage of any motion or resolution.

(4) All matters, which in the judgment of the commission are of a legislative character, shall be embodied in the form of a resolution.