In January 2016, the Gypsum Association released GA-216-2016, Application and Finishing of Gypsum Panel Products. On page 3, section 2.2.12.4 should read:
“2.2.12.4 Where studs complying with ASTM C645 are used to receive Abuse Resistant or Impact Resistant Gypsum panels, they shall be not less than 0.0312 in. (0.792 mm) design thickness and shall be in accordance with sections 4.3 and 8.1 of Specification C645.”