Since the document has no page numbers you'll need to scroll down until you get to the rite, which is listed in the Table of Contents as among the Pastoral services, shortly after the seasonal materials.
For background on this service, you can read this previous post.
The opening rubrics of the service read as follows:
A Service of Renaming
When an event or experience leads a baptized person to take or to be given a new name, the following may be used to mark this transition in the parish community. It is expected that the presider or someone appointed by the presider has prepared the candidate for this rite through pastoral conversation and theological reflection.
This new beginning is distinct from the new life begun in Holy Baptism, which conveys regeneration and the responsibilities of Christian discipleship.
The rite can be used on its own or in place of the Word of God during a celebration of the Holy Eucharist. It is particularly commended for use on a major feast day or any of the following occasions: Advent 3 (Gaudete); Holy Name (Jan. 1); Presentation in the Temple (Feb. 2); The Last Sunday After the Epiphany (Transfiguration Sunday); The Feast of the Transfiguration (Aug. 6).
Throughout the rite, the pronouns “they,” “their,” and “them” are used, with corresponding verb forms. These pronouns should be adapted to the preference of the person receiving or claiming the new name, with appropriate adjustment to the accompanying verbs.