The Canons of the Council in Trullo; Often Called The Quinisext Council 56Canon LVI.

We have likewise learned that in the regions of Armenia and in other places certain people eat eggs and cheese on the Sabbaths and Lord's days of the holy lent. It seems good therefore that the whole Church of God which is in all the world should follow one rule and keep the fast perfectly, and as they abstain from everything which is killed, so also should they from eggs and cheese, which are the fruit and produce of those animals from which we abstain. But if any shall not observe this law, if they be clerics, let them be deposed; but if laymen, let them be cut off.