The dossier window begins on July 15th at 12:01 AM and will remain open until March 31st by 5:00 PM (MDT) the following year, unless otherwise extended by the New Mexico Public Education Department.
If you submit earlier and did not meet on a strand, you have more time to fix strands prior to the deadline, and do not have to wait until July 15th when the next session opens to resubmit. Submitting earlier is always recommended, to reduce stress, and rushing to submit on time.
Administrators are not tied to the deadline, so the Administrator completing strands D and E may be completed after March 31st with no penalty to you. Just ensure they are aware of your intent to submit.