***Des is a lot closer to the situation than you are, and DOES happen to know the facts.***
Sure, sure, and Burke is a Canon lawyer. Duly noted.
"All priests, in union with bishops, so share in one and the same priesthood and ministry of Christ that the very unity of their consecration and mission requires their hierarchical communion with the order of bishops. At times in an excellent manner they manifest this communion in liturgical concelebration as joined with the bishop when they celebrate the Eucharistic sacrifice" (PO 7). Clearly, the mystery of the Eucharist also appears here as a sign and source of unity. The sacrament of Orders is connected with the Eucharist. Orders establishes the hierarchical communion between all those who share Christ's priesthood: "All priests," the Council adds, "both diocesan and religious, by reason of Orders and ministry, fit into this body of bishops and priests, and serve the good of the whole Church according to their vocation and the grace given to them" (LG 28).
FULL TEXT This priest, despite the good efforts of Burke, has voluntarily chosen to sever the ties to his bishop. He is now excommunicated. End of story!