Thanks for the ping! Post 159 really got my attention.
One of the memos says "not later than (NLT)" and my husband said it would not have been shown that way. You use the NLT as an acceptable abbreviation and there is no reason to have spelled it out. It would not be considered military form in his opinion.
Many questions about these memos. I hope the media questions their authenticity. As should the WH, obviously!