CIC/1917, can. 2219
§ 2. At si dubitetur utrum poena, a Superiore competenti inflicta, sit iusta, necne, poena servanda est in utroque foro, excepto casu appellationis in suspensivo.
§ 3. Non licet poenam de persona ad personam vel de casu ad casum producere, quamvis par adsit ratio, imo gravior, salvo tamen praescripto can. 2231."
Sources
1917 Codex Iuris Canonicis, can. 2219, in: www.jgray.org (Last access: 20.05.2016).
Codex Iuris Senior, can. 2219, in: www.catho.org (Last access: 20.05.2016).
GASPARRI, Pietro (Hg.), Codex Iuris Canonici Pii X Pontificis Maximi iussu
digestus, Benedicti Papae XV auctoritate promulgatus, Rom 1917, can. 2219,
S. 599, in: archive.org (Last access: 20.05.2016).