VI. Any bishop who refuses consent to these rules must be deposed.
This admonition of ours, therefore, proclaims that if any of our brethren endeavour to contravene these rules and dare to do what is forbidden by them, he may know that he is liable to deposition from his office, and that he will not be a sharer in our communion who refuses to be a sharer of our discipline. But lest there be anything which may possibly be thought to be omitted by us, we bid you, beloved, to keep all the decretal rules of Innocent of blessed memory, and also of all our predecessors, which have been promulgated about the orders of the Church and the discipline of the canons, and to keep them in such wise that if any have transgressed them he may know at once that all indulgence is denied him.
Dated 10th of October, in the consulship of the illustrious Maximus (a second time) and Paterius (A.D. 443).
Source: Letters (New Advent)