Beatification allows for official liturgical commemoration in a particular territory, e.g., the upcoming beatification of John Paul II will mean that he can be publicly venerated in Poland and the Diocese of Rome.
Here is the decree concerning John Paul II:
Decree Concerning the Liturgical Cult of Blessed John Paul IIDECREE
The beatification of the Venerable John Paul II, of happy memory, that will take place May 1, 2011 at the Basilica of St. Peter in Rome, presided over by the Holy Father Benedict XVI, has a mark of exceptionality, recognized by the entire Catholic Church throughout the world. As we await this extraordinary event, following the numerous requests concerning the liturgical cult of the new Blessed, according to the places and modes established by law, this Congregation for Divine Worship and the Discipline of Sacraments takes care to communicate what has been arranged in this regard.
Mass of ThanksgivingIt has been decided that throughout the year successive to the beatification of John Paul II, that is, up to May 1 2012, it will be possible to celebrate a Mass of Thanksgiving to God in significant places and days. The responsibility of establishing the day or days, as well as the place or places, for the gathering of the People of God will be up to the diocesan bishop for his diocese. Considering local needs and pastoral convenience, it will also be allowed to celebrate a holy Mass in honor of the new Blessed on a Sunday
during the year as, moreover, on a day between Nos. 10-13 of the
Table of liturgical days-
In the same manner, it is up to the Superior General of religious families to offer indications about the significant days and places for the entire religious family.
As to the holy Mass, with the possibility of singing the
Gloria, the collect in honor of the Blessed (see below) will be prayed. The other prayers, the preface, the antiphons and the Bible readings are drawn from the Common of Pastors, for a Pope. If a Sunday during the year recurs, for the Bible readings texts adapted from the Common of Pastors may be chosen for the first reading, with the relative responsorial psalm, and for the Gospel.
Inscription of the new Blessed into particular calendarsIt has been decided that the celebration of Blessed John Paul II, Pope, will be celebrated every year on October 22 as a memorial in the calendar proper to the diocese of Rome and the dioceses of Poland
As to the liturgical texts, the collect oration and the second reading of the Office of Readings, with the relative responsorial (see below), are permitted as proper. The other texts will be drawn from the Common of Pastors, for a Pope.
As to other proper calendars, the request to inscribe the optional memorial of Blessed John Paul II can be presented to this Congregation by the Conference of Bishops for their territory, by the diocesan bishop for his diocese, by a Superior General for his/her religious family,
The dedication of a Church to God in honor of the new BlessedThe choice of Blessed John Paul II as the name of a church calls for the indult of the Apostolic See (cfr.
Ordo dedicationis ecclesiae,
Praenotanda n. 4), except when his celebration is already inscribed in the particular calendar: in this case, the indult is not called for and to the Blessed – in the church with his name – is reserved the level of feast (cfr. Congregatio de Cultu Divino et Disciplina Sacramentorum,
Notificatio de cultu Beatorum, 21 May 1999, n. 9).
Notwithstanding anything to the contrary.
From the Congregation for Divine Worship and the Discipline of Sacraments, April 2, 2011
Antonius Card. Cañizares Llovera Praefectus
Iosephus Augustinus Di Noia, op Archiepiscopus a Secretis
Source:
EWTN 
