I do not think they are required to follow this rule since the NCHSAA allowed the transfers within the publics. I am not in tune with these rules now.
I do know that it was enforced by CC very strictly at one time. Student attended Catholic schools system and CC from K through freshman or sophomore year. Left for a year to his home public school (seven miles distance between schools), returned to CC after one year and CC would not allow him to play based on the 365 rule. I did not agree with this, thought he should have been allowed to play.