Personal ordinariate
If membership by reception of the sacraments of initiation within an ordinariate is open not only to the Catholics mentioned in the 2013 amendment but to others also who have no Anglican background - something on which no express statement has been issued - anyone who has not yet received all three sacraments of initiation may join. This includes non-Christians, those who, in the view of the Catholic Church, do not have valid baptism (such as Mormons), and those who, again in the view of the Catholic Church, have valid baptism but not valid confirmation or Eucharist. Protestants in general are seen as lacking valid confirmation, but the Eastern churches and some Western ones, such as some Old Catholic churches and the Polish National Catholic Church, are recognized as having valid sacraments.
Baptismal regeneration
Section 1215 of the Catechism of the Catholic Church states: "This sacrament [baptism] is also called 'the washing of regeneration and renewal by the Holy Spirit,' for it signifies and actually brings about the birth of water and the Spirit without which no one 'can enter the kingdom of God.' (Titus 3:5)" Quoting the Decree on the Church's Missionary Activity:14(para 1), Christopher J. Walsh comments that the Second Vatican Council reaffirms the traditional understanding of Christian initiation as a unity and a process. "It is not something achieved with a trickle of water one Sunday afternoon, but a progressive entry into a commitment and a relationship ... Becoming a Christian is a conversion a growing adherence to Christ in faith and sacrament over an extended period of time." (See also Catechism of the Catholic Church, 1229–31)