Section 6-9A-8 - Acting by reference; written ballots(a) Except as otherwise expressly provided by law, the members of a public agency may not deliberate, vote, or otherwise take official action upon any matter by reference to a letter, number or other designation or other secret device or method, which may render it difficult for persons attending a meeting of the public agency to understand what is being deliberated, voted or acted upon. However, this subsection does not prohibit a public agency from deliberating, voting or otherwise taking action by reference to an agenda, if copies of the agenda, sufficiently worded to enable the public to understand what is being deliberated, voted or acted upon, are available for public inspection at the meeting.(b) A public agency may not vote by secret or written ballot.