§1. Unless the law provides otherwise, a quasi-parish is equivalent to a parish; a quasi-parish is a definite community of the Christian faithful in a particular church, entrusted to a priest as its proper pastor but not yet erected as a parish because of particular circumstances.
§2. When certain communities cannot be erected as parishes or quasi-parishes, the diocesan bishop is to provide for their pastoral care in another way.
Source: Code of Canon Law (Vatican.va)