So then not actually forbidden
I would love to read your copy of a code before 90 since no uniform code existed
I never said a “Code” of Canon Law, but as you should know Pope Pius XII has approved many laws for the eastern rites. He and those under him were working towards an eastern Code.
I have a good book on it by Fr. Popishil, but cannot find it right now.
Anyway, all this is besides the point. Where is your proof that the eastern rite Catholic Churches allowed its people to attend Orthodox churches prior to V2. That is the crux of the matter, and it needs to be addressed by you, not me, as you have asserted this, and have yet to prove your assertion.
I have said on here and still say that this is not true, that the eastern Catholics, as did Roman Catholics never allowed this practice, and it is a V2 novelty in both Latin and Eastern Churches.