Can Utah agencies define statutory terms using technical expertise? Associated General Contractors v. Board of Oil, Gas & Mining Explained

In Associated General Contractors v. Board of Oil, Gas & Mining, the Utah Supreme Court addressed the scope of administrative agencies’ authority to define technical statutory terms within their areas of expertise.

Background and Facts

The Utah Mined Land Reclamation Act excludes “sand, gravel, and rock aggregate” from regulation, but the legislature did not define these terms. The Board of Oil, Gas and Mining promulgated a rule defining these terms using geological criteria—focusing on particle size, consolidation, and sedimentary processes. Associated General Contractors challenged this approach, arguing the Board should have used economic definitions based on materials lacking “unique value” compared to surrounding materials.

Key Legal Issues

The case presented questions of standard of review under the Utah Administrative Rulemaking Act and whether agencies may interpret statutory terms using their technical expertise rather than judicial precedent from other contexts.

Court’s Analysis and Holding

The Court applied an arbitrariness and capriciousness standard to the agency’s interpretation of technical terms within its expertise. The Court noted the Mining Act itself uses geological terminology throughout, making the Board’s geological approach consistent with the statute’s framework. The Court rejected AGC’s reliance on cases interpreting different statutes, emphasizing that statutes must be construed from their “plain language” rather than extraneous contexts. The Court also found substantial evidence supported the rule, as the Board relied on recognized geological sources from the American Geological Institute and U.S. Bureau of Mines.

Practice Implications

This decision demonstrates that Utah courts defer to agencies’ technical expertise when reviewing statutory interpretations within the agency’s regulatory domain. Practitioners challenging administrative rules must marshal all supporting evidence and demonstrate specific inadequacies rather than making conclusory arguments. The case also reinforces that agencies should ground their rules in authoritative sources within their field of expertise.