The diocesan bishop must hear the finance council and college of consultors to place acts of administration which are more important in light of the economic condition of the diocese. In addition to the cases specially expressed in universal law or the charter of a foundation, however, he needs the consent of the finance council and of the college of consultors to place acts of extraordinary administration. It is for the conference of bishops to define which acts are to be considered of extraordinary administration.
Source: Code of Canon Law (Vatican.va)