From the article:
'The directory, approved by Pope John Paul II in 1993, applies the principles in the Second Vatican Council's 1964 Decree on Ecumenism, which opened Catholicism to such cooperation with non-Catholics.
Catholic canon law limits use of churches to "things which serve the exercise or promotion of worship, piety or religion." '
That's part of the spirit of Vatican II's Ecumenism stuff. It fits neatly in with the 100 anathemas of Trent which are confirmed by Vat II. Kinda schizophrenic on it's face; but, there's a method to it..