Ego…

Archiepiscopus…

beato Petro apostolo,

Sanctae Romanae Ecclesiae,

ac tibi, Summo Pontifici,

tuisque legitimis Successoribus

semper fidelis ero et oboediens. 

Ita me Deus omnipotens adiuvet.

I…

Archbishop of the _____ diocese (these are adjectives)

will always be faithful and obedient to

St. Peter the apostle,

the Holy Roman Church,

and to you, the Supreme Pontiff

and to your legitimate Successors.

So help me God Almighty.