Canon 51

1. It is for the Roman Pontiff alone to convoke an ecumenical

council, to preside over it personally or through others, to

transfer, suspend or dissolve it, and to confirm its decrees.

2. It is for the same Roman Pontiff to determine matters to be

treated in a council and to establish the order to be followed in

the same council; to the questions proposed by the Roman Pontiff

the fathers of a council can add other questions, to be approved

by the same Roman Pontiff.