My question and the point is: how to understand
".......Accordingly, such child will be able to obtain a green card as an accompanying beneficiary or a following-to-join beneficiary even after he/she reaches 21 years of age inasmuch as he/she applies for a green card within 1 year from the date when the priority date becomes available in the Visa Bulltin."
Here, "inasmuch as he/she applies for a green card within 1 year.....", only filling I-485 means "applies for a green card" or filling I-824 also means a starting to apply for a green card? The lawyers have different comments for this issue.
Thanks very much again!