**How would one go about getting a Latin Mass at one’s parish? **
I believe 30 people must request it in writing to the priest and then it goes forward from there. Makes sense to me.
There is no mention in either the Summorum Pontificum or its accompanying letter of the magic number 30. Of course, the more people that you could present to the pastor the more likely that he would respond favorably rather than consider you a mere nuisance. Above all, be patient. For a priest that has not been trained in the ancient form of the Mass, its precise rubrics and be a bit intimidating and will take time to learn. Additionally, a more important hurdle is that few of the younger priest have been trained in Latin and most of the older ones who were have most likely forgotten; it has been 40 years since it has been needed. Perhaps a good place to start is to suggest that you and a small group could meet with one of the priests of the parish and learn Latin together.
That number 30 was put out in the speculation days, it was not accurate, and it’s not part of the MP. You can imagine the difficulty of trying to establish a number. In a small town with a parish of 100, a group of 10 devotees might be significant enough to offer a “1962 Missal” Mass weekly or monthly.
I guess this is why the Holy Father used phrases conveying the idea of a stable interest, sincere interest, rather than a specific number.