If you've already covered S1 or S2 qualifiers you don't need to apply again.
Open:
TWHK/NA: 21st & 23rd of September
CN/EU/LatAm: 22nd & 24th of September
Oceanic: 24th of September
Closed:
TWHK/NA: 25th of September
CN/EU/LatAm/Oceanic: 26th of September