At the ordinary session of the Bishops' Conference of Yugoslavia in Zadar from April 9 - 11, 1991 the following was adopted:
The bishops, from the very beginning, have been following the events of Medjugorje through the Bishop of the diocese (Mostar), the Bishop's Commission and the Commission of the Bishops Conference of Yugoslavia on Medjugorje.
On the basis of the investigations, so far it cannot be affirmed that one is dealing with supernatural apparitions and revelations.
However, the numerous gatherings of the faithful from different parts of the world, who come to Medjugorje, prompted both by motives of belief and various other motives, require the attention and pastoral care in the first place of the diocesan bishop and with him of the other bishops also, so that in Medjugorje and in everything connected with it a healthy devotion to the Blessed Virgin Mary may be promoted in accordance with the teaching of the Church.
For this purpose, the bishops will issue especially suitable liturgical-pastoral directives. Likewise, through their Commission they will continue to keep up with and investigate the entire event in Medjugorje.
In Zadar April 10, 1991
The Bishops of Yugoslavia
Are pilgrimages to Medjugorje permitted or not???
This is one of the most discussed topics on the subject of Medjugorje: Pilgrimages.
Keep in mind as you read this, that the 1978 CDF document on apparition discernment used by bishops says (emphasis mine in bold):
b) Then, if this examination appears favorable, to allow certain public demonstrations of cult and devotion, while continuing to investigate the facts with extreme prudence(which is equivalent to the formula: “for the moment, nothing is opposed to it”).
With that in mind, you may notice two common threads in each of these communications out of the Bishop's conference and the Vatican.