 As different member churches of the Anglican Communion have different policies on the ordination of women, there are some churches (such as the Anglican Church of the Southern Cone) and some dioceses (such as Sydney) in which women may be ordained deacons, but not priests or bishops.Certain laypeople may receive specific commission or authorisation from a bishop (often on recommendation of a parish or its clergy) to perform certain aspects of ministry.The rationale for licensing is that the ministry is considered too specialised or otherwise extraordinary to be carried out in the absence of individual evaluation and recommendation.