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1. Referring to materials, devices, or construction accepted by the authority having jurisdiction, by reason of tests or investigations conducted by it or by an agency satisfactory to the authority, or by reason of accepted principles or tests by national authorities or technical or scientific organizations.
2. Referring to occupancy or use, accepted by the authority having jurisdiction by reason of the submission of adequate proof of conformity with the basic requirements of the code under which the authority functions.
McGraw-Hill Dictionary of Architecture and Construction. Copyright © 2003 by McGraw-Hill Companies, Inc.
In air traffic phraseology, it means permission for the proposed action is granted.
An Illustrated Dictionary of Aviation Copyright © 2005 by The McGraw-Hill Companies, Inc. All rights reserved