فإن قدموها قبل يوم الفطر جاز
Translation: If they pay it before Eid day, that is permissible.
The verb indicates making the payment in advance. The manual permits payment before the day of Eid, so payment need not always be withheld until Eid morning.
Advance permission does not move the original moment when liability arises. Keep the rule about the legal trigger distinct from permission to pay early.