Utah Code Ann. § 59-1-405
(1) As used in this section, "confidential tax matter" means:
(d) a tax matter if the disclosure of the tax matter is prohibited under:
(3) In accordance with Title 63G, Chapter 3, Utah Administrative Rulemaking Act, the commission shall make rules:
(4) For purposes of Subsection (3)(b), the commission is not required to make rules to establish procedures and requirements for keeping confidential minutes and a confidential recording of:
(b) private analysis, contemplation, and discussion by members of the commission: