§1. Clerics are to foster simplicity of life and are to refrain from all things that have a semblance of vanity.
§2. They are to wish to use for the good of the Church and works of charity those goods which have come to them on the occasion of the exercise of ecclesiastical office and which are left over after provision has been made for their decent support and for the fulfillment of all the duties of their own state.
Source: Code of Canon Law (Vatican.va)