男性 50歳

23.1.3. Registration Window 3: for Participating Clubs who qualify for the Quarter Finals, fifteen (15) days prior to their first Match of the Quarter Finals.

次の登録期限は準々決勝の前で、最初の試合の15日前まで。

ACL規定

24.4.1. No later than seven (7) days prior to their first Match in the Competition, replace up to three (3) Participating Players in the event that they aredeemed medically unfit to play. The AFC shall receive:
24.4.1.1. a detailed medical assessment in English by a certified doctor.
This assessment may be reviewed by a member of the AFC Medical Committee to confirm whether the injury is sufficiently serious to prevent the Participating Player from taking part in the Competition; and,
24.4.1.2. the supporting documents of the replacement Participating Player as stipulated in Article 27.
24.4.2. No later than seven (7) days prior to their first Match in the Competition,replace or add up to five (5) Participating Players for any reason provided that the maximum number of registered players is not exceeded.
24.4.3. For the avoidance of doubt, a Participating Club may replace or add, subject to the relevant provision, a maximum of eight (8) Participating Players during this replacement period.

※要約すると、
最初の試合の7日前までなら医師の診断により出場不可な選手３名までおよび登録できる最大人数を越えてなければ理由によらず５名まで、すなわち最大８名まで変更または追加が可能
となるようなので、登録選手を変更可能な期間(2/7まで)を過ぎているのではないでしょうか。