In each diocese the diocesan bishop must appoint a vicar general who is provided with ordinary power according to the norm of the following canons and who is to assist him in the governance of the whole diocese. - Code of Canon Law
The position of vicar general is an appointed office in the administrative structure of the Diocese which is established to assist the Bishop in the governance of the whole Diocese. Every diocese is required to have at least one vicar general as prescribed in the Code of Canon Law, canon 475.
By virtue of office, the vicar general has the executive power over the whole diocese which belongs to the diocesan bishop by law, namely, the power to place all administrative acts except those, however, which the bishop has reserved to himself or which require a special mandate of the bishop by law. The vicar general must report to the diocesan bishop concerning the more important affairs which are to be handled or have been handled, and he is never to act contrary to the intention and mind of the diocesan bishop.
Moderator of the Curia
The Moderator of the Curia, under the authority of the Bishop, oversees the curia offices and assists the Bishop in coordinating the activity of the members of the curia in accord with the prescripts of canon 473 §2 of the Code of Canon Law.
The Moderator of the Curia is responsible for the pastoral programs of the Diocese and works closely with the Diocesan Chancellor to insure that the administrative functions of the local Church are carried out in accord with prescribed norms and in a manner consistent with the Church's mission and the Bishop's vision.