The Ceremonial of Bishops 1034 notes that it is proper to crown images of the Blessed Virgin Mary which are of great renown and to which the faithful come with confidence.
Some questions:
1) Does the Ceremonial refer to a permanent crowning?
2) Is it necessary to request approval from the Holy See prior to permanently crown an image of the Blessed Virgin Mary?
3) What is the relationship of this directive (and others in the CB) with the many celebrations in schools, repeated year after year? Does the Ceremonial of Bishops inform these celebrations in any way?
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A: A new English translation of this ritual is in the works, so the complete ceremony will eventually make its way through the conferences of bishops for approval.
1) The order of service does not indicate if this is a permanent crowning, but that seems to be the case.
2) There is no indication that the Holy See is to be consulted before a crowning. The ceremony seems to be within the purview of the bishop. Nonetheless, #8 of the Order indicates that some images may be crowned in the name of the Roman Pontiff, so I presume that some consultation would need to take place in that case.
3) Neither the Ceremonial nor the Order of Crowning has any direct consequence for the many celebrations observed on the parish level and in schools each year. The grassroots spread of these ceremonies at the end of the 16th century elicited the approval of bishops, some of whom began crowning images themselves, so this liturgy was devised to help the bishops (#4). The ritual in question comes from those in the Roman Pontifical and therefore pertain to the bishop. The bishop is supposed to celebrate it only for images that have achieved some renown among the faithful in places that have developed a liturgical cult and Christian vitality (#6). School celebrations may derive ideas from the Order, but these fall more under popular piety and need not follow the Order directly.