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… (CARs) 2019-1 Standard 621 - Obstruction Marking and Lighting Amendment Foreword (effective 2016/03/01) 1. … this publication is to provide standards for marking and lighting of objects that present a hazard to the safe … 3. CANCELLATION. Standard 621, Obstruction Marking and Lighting, 1st Edition, dated 31 December 2011 is cancelled by …
172.678
… list is exhaustive; if a task is not listed, it is not elementary work. Elementary work is a form of maintenance that is not subject …
63.11