Arizona Constitution Art. VI § 2. Supreme court; composition; divisions; decisions, transaction of business

Section 2. The supreme court shall consist of not less than five justices. The number of justices may be increased or decreased by law, but the court shall at all times be constituted of at least five justices.

The supreme court shall sit in accordance with rules adopted by it, either in banc or in divisions of not less than three justices, but the court shall not declare any law unconstitutional except when sitting in banc. The decisions of the court shall be in writing and the grounds stated.

The court shall be open at all times, except on nonjudicial days, for the transaction of business.