sealed orders

plural noun
  1. written orders or instructions that are not to be looked at until a specified time, especially orders that are given in sealed form to a commander of a vessel to be opened after the vessel is out of contact with the shore.
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British Dictionary definitions for sealed orders

sealed orders

pl n
  1. written instructions that are not to be read until a specified time
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012