Just published in the federal register, the Federal Communications Commission has updated part 15, specifically 15.31 on the measurement standards to be used for Unlicensed Personal Communications Service (UPCS) under part 15, subpart D.
ANSI C63.17 2013 replaces the 2006 version of the standard.
ReferenceFederal Register Post for January 21, 2015: http://www.gpo.gov/fdsys/pkg/FR-2015-01-21/pdf/2015-00794.pdf