53. After the iter envisaged for the revision or composition of the Particular Calendar and the Proper, the competent authority requests the recognitio from the Congregation for Divine Worship and the Discipline of the Sacraments.
This sort of reads like directions one might expect in the Torah, but it does lay out the particulars of procedure for the diocese, religious superior, or other leader:
The request must be accompanied by the texts to be approved, submitted in duplicate and in electronic format, together with a brief detailed report on the work carried out, including the reasons for any variation or inclusion of celebrations, in light of the latest approved Calendar and Proper and current norms.
The link of the English translation is here.