Any vote of the council, including a roll call vote, may be registered by the members by answering “yes” for an affirmative vote or “no” for a negative vote upon his name being called by the city clerk, or by pressing a switch to cause a green light to show for an affirmative vote or a red light to show for a negative vote upon a vote being called for by the presiding officer. The result of any vote registered by means of a lighting system shall be audibly announced by the city clerk and recorded in the minutes as the vote.
(1964 Code, § 2-91)