So if I understand this right, a ULS submission prior to the day the call sign becomes available might get rejected if it gets there before the call sign is available but there are a number of days it can be submitted afterwards and still make the selection pool as they hold the submission period open to accommodate those who mail in their applications.
So using ULS and submitting the day it becomes available or possibly the follow few days should get me in the pool for the random selection.
Correct?
The first day available is what you want if it's a popular selection since only those with submissions on that day will be in the pool to be picked. Now if nobody applies on that day the pool will be from those that submit on the first day submissions are received after that day.
For example:
* On the day prior to the call being available, one person submits an application for that call. His application will be rejected as being too early (the call not yet available).
* On the first day the call is available for selection, user A, B, C, D, and E submits their application online while user F mails their application that's postmarked as being mailed on that day. After the waiting period (18 days I believe) to allow time for the applications delivered by the USPS to arrive the FCC will place all 6 valid applications from that day into a pool and select the winner from those six. Any one of those six users, A - F can be selected as the winner, assuming that their applications were valid and had no errors.
* Over the next few days various users submit applications for that call. They will all be rejected since they were submitted after the pool had been gathered.