en.radiovaticana.va/news/2016/09/15/pope_francis_issues_motu_proprio_harmonizing_canon_law_codes/1258248
catholicculture.org/culture/library/view.cfm?recnum=11370
Recently revised adding sui iuris into § 1, renaming § 2 to § 3 and adding a new § 2 below:
§ 2. If only one of the parents be catholic, the baptized is ascribed to the Church to which the catholic parent pertains.
The Rescript of 112 allowing transfer for the Latin Church faithful with the same rule as the eastern (agreement of both bishops) is below:
AAS 85 [1983] 81:
Acta Ioannis Pauli Pp. II
SECRETARIA STATUS
Fit facultas licentiam de qua in can. 112, 1, 1 C.I.C. legitime, in casu, praesumenda.
RESCRIPTUM EX AUDIENTIA SS.MI
Ad normam can. 112, 1, I Codicis Iuris Canonici, quisque vetatur post susceptum Baptismum alii ascribi Ecclesiae rituali sui iuris, nisi licentia ei facta ab Apostolica Sede. Hac de re, probato iudicio Pontificii Consilii de Legum Textibus Interpetandis, Summus Pontifex Ioannes Paulus II statuit eiusmodi licentiam praesumi posse, quoties transitum ad aliam Ecclesiam ritualem sui iuris sibi petierit Christifidelis Ecclesia Latinae, quae Eparchiam suam intra eosdem fines habet, dummodo Episcopi diocesani utriusque dioecesis in id secum ipsi scripto consentiant.
Ex Audientia Sanctissimi, die xxvi mensis Novembris, anno MCMXCII.
ANGELUS card. SODANO
Secratarius Status