And the answer to that question is also "
super simple". Like Susie already responded above, the Memorandum you referenced clearly explains that. Anyone who bothers to take their time to go through the
7 pages of that Memo, will find the "super simple" answer there. The Memo even has a an easy to follow clear example with a CN!
For those who for one reason or do other cannot go through the 7 page Memo, a couple of sections on the AOS Process spreadsheet has done a fantastic job (yes, IMO) of breaking it down. Here's an example, from the
AOS FAQ tab:
What is Early Filing?: "Early filing" is the filing of applications for AOS,
approximately 50 to 60 days in advance of actual DV visa availability. The Advanced Notification section of the VB enables persons to file their Form I-485 applications prior to the time a DV visa becomes “immediately available.” - If your CN is listed under the Advanced Notification of the VB (SECTION C), you may wish to take advantage of this and send in your AOS package early (following the VB release). ** You can read more about "Early Filing" from the linked 2013 Policy Memorandum -
Early Filing Memo SIDE NOTE: Early filing may have potential consequences - see below" (and there are at least 4 subsequent questions/answers dealing about Early Filing following what I quoted above).
If you cannot make your own decision as to precisely when to file, given the wealth of information you've already been provided with, maybe you need to hire an immigration lawyer and have them make all the decisions on your behalf. Or just wait until the actual month in which your CN becomes current before filing.