http://www.ewtn.com/library/CURIA/CDFEcuм.HTM
III—With regard especially to <mixed assemblies and conferences of Catholics with non-Catholics>, which in recent times have begun to be held in many places to promote "union" in the faith, there is need of quite peculiar vigilance and control on the part of Ordinaries. For if on the one hand these meetings afford the desired opportunity to spread among non-Catholics the knowledge of Catholic doctrine, which is generally not sufficiently known to them, yet on the other hand they easily involve no slight danger of indifferentism for Catholics. In cases where there seems to be some hope of good results, the Ordinary shall see that the thing is properly managed, designating for these meetings priests who are as well qualified as possible to explain and defend Catholic doctrine properly and appropriately[/b]. The faithful, however, should not attend these meetings unless they have obtained special permission from Ecclesiastical Authority, and this shall be given only to those who are known to be well instructed and strong in their faith. Where there is no apparent hope of good results, or where the affair involves special dangers on other grounds, the faithful are to be prudently kept away from the meetings, and the meetings themselves are soon to be ended or gradually suppressed. As experience teaches that larger meetings of this sort usually bear little fruit and involve greater danger, these should be permitted only after very careful consideration.
Let see what this part of the docuмent from the Holy Office (now known as the Congregation for Doctrine of the Faith) says:
The
purpose/intent of meeting with non-Catholics is to spread the Catholic Faith.
There is to be vigilance and control on part of the Ordinaries. They are to determine which meetings have the hope of bearing good results (spreading the Faith) and no danger of indifferentism.
Meetings where there is no apparent hope of good results and/or pose other dangers, the faithful are to be kept away, and the meetings suppressed.
If it is determined that the meeting has the hope of bearing good results and no danger of indifferentism then:
The primary participants in these meetings are to be well qualified priests, able to explain and defend Catholic doctrine.
The faithful are to be kept away from these meetings, unless special permission is given and only to those who are well instructed/strong in the Faith.
Larger meetings with non-Catholics bear little good fruit and pose greater dangers, therefore permitted only after careful consideration.
So the sole intent of these meetings is to bring the non-Catholics to the Faith, and only to be attended by a select few (well instructed/strong in the Faith) with the ability of teaching and defending the Faith.
This does not look at all like the "ecuмenical" get togethers put forth by the VatII era of Popes.