Each local church is duty-bound to attend to the needs of its parishioners, especially regarding baptisms, first sacraments, weddings, and funerals.
Registering is a personal commitment to be a continuous and active member of a parish and to associate yourself with its mission and ministry.
It helps the pastor be able to plan his ministry, knowing the particular needs of the parish, his parishioners, and their families. A parish is better equipped for ministry when it knows the accurate size of the parish as well. It also allows you to highlight your gifts, interests, and needs, and how you might be of service to the parish community.