5.G.10.4 Recording Ascription to a Church Sui Iuris Change of Rite
1. The original ascription of a person into a Catholic Church sui iuris created by baptism or reception into communion is to be annotated in the parish registry of baptism or reception.
2. Any subsequent change of ascription is to be annotated in that parish registry, or the place of archive, but only according to the instructions of the curia. 
 See cc. 111, 112 and 535 §2 (De Concordia Inter Codices); CCEO cc. 32-34.