Honestly thought this had been announced weeks ago but it seems it is just in the dates on the div threads (and the schedule)
Teams must play each match before the deadline shown but it can be any time before, so for instance for divs A,B & C they can play all remaining matches this week if they want...
The match deadlines for the remaining weeks of the ladder are
Week 4 - 13/12/20
Week 5 - 20/12/20
weeks6/7 - 10/1/20
for div d we will announce teh deadline when all week 6 matches are played and the table completed.