CIC/1917, can. 1061
1º Urgeant iustae ac graves causae;
2º Cautionem praestiterit coniux acatholicus de amovendo a coniuge catholico perversionis periculo, et uterque coniux de universa prole catholice tantum baptizanda et educanda;
3º Moralis habeatur certitudo de cautionum implemento.
§ 2. Cautiones regulariter in scriptis exigantur."
Sources
1917 Codex Iuris Canonicis, can. 1061, in: www.jgray.org (Last access: 08.03.2016).
Codex Iuris Senior, can. 1061, in: www.catho.org (Last access: 08.03.2016).
GASPARRI, Pietro (Hg.), Codex Iuris Canonici Pii X Pontificis Maximi iussu digestus, Benedicti Papae XV auctoritate promulgatus, Rom 1917, can. 1061, S. 302, in: archive.org (Last access: 08.03.2016).