According to the new ANV timeline (now including a Community Review Period), AGPs are due by October 3rd.
Flock proposals are often demanding to shape up and requires back and forth discussions with the community. The Aragon Association recommends applicants to the Flock program to engage on the Aragon forum at least two weeks before this submissions deadline (19th of September).
Note: The Flock application process will -hopefully- change after ANV-4. An AGP has been submitted by the AA in order to merge the Flock process with the AGP process.