The reunion can only happen individually as the orders of this group is not recognized as holy or legitimate, especially due to the Milingo connection, from Wiki:
Actually, SyroMalankara, the Ango-Lutheran Catholic Church (ALCC) picked up its Orders from + Peter Paul Brennan, Francis C. Spataro, and + Padget Mack in January of 2004, two years before + Brennan was reordained a bishop conditionally (“sub conditione”) by + Milingo.
So the later + Brennan’s Miningo connection is simply not relevant because it occurred years later.
I remind you that the Roman Catholic Church still officially adheres to the Augustinian criteria for the transmission of valid apostolic succession, not to the more subjective Cyprianic criteria (promulgated by St. Cyprian,) which denies that schismatics and heretics and those formally excommunicated can not pass on valid apostolic succession and that the Orders and Sacraments of schismatics and heretics - and those excommunicated - are therefore null and void.
For what it is worth, the Catholic Church recognizes the technical validity of the Orders and Sacraments of the Old Catholic Churches of the Utrech Union, the PNCC, the Catholic Apostolic Church of Brazil, and others as “illicit but valid” or “irregular but valid,” and describes those Churches as “daughter Churches” even though the bishops from whom those lineages derive were all formally excommunicated, and the ministry of deacons, priests, and bishops in their lineages may not be exercised in the Roman Catholic Church “under its flag.”
Until Rome formally amends the 1983 Canon Law Code in this area and formally adopts the Cyprianic criteria, whether one likes it or not officially/technically, the Orders and Sacraments of those ordained by schismatics, heretics, and those excommunicated are illegal/illicit, or at best irregular, but are still are
technically quite valid.
The Eastern and Oriental Orthodox Churches - and since the 1920 Lambeth Conference - the Anglican Communion and soon after that, the Utrech Old Catholics - follow the Cyprianic criteria and see things quite differently. That is one of the differences between the Roman Catholic Church and the Eastern Churches. The Eastern Churches sometimes accuse the Augustinian criteria of being “mechanistic” or “magic,” but the Catholic Church disagrees.
For an interesting in-depth discussion of this issue I refer you to the discussion page of the Wikipedia article, “Independent Catholic Churches” :
en.wikipedia.org/wiki/Talk:Independent_Catholic_Churches, ) Incidentally, although the theology, polity, spirituality and worship of the Anglo-Lutheran Catholic Church is solidly Roman Catholic, it considers itself to be technically Lutheran due to its origins as an off-shoot of the Lutheran Church-Missouri Synod and subscribes to the Lutheran Confessions insofar as they agree – on a line by line basis, with the Catechism of the Catholic Church. It’s apostolic lineages (which includes that of the Catholic Apostolic Church of Brazil and the Dutch Old Catholic Church) are discussed on that page under the heading, “A quick test on legitimate Apostolic Succession.”
As far that statemement that this reunion with the Catholic Church is concerned, the ALCC expects its clergy to be reordained by Rome, and even were that felt to be unnecessary, it would request it anyway.
Concerning the comment that “the reunion can only happen individually,” there you are right regardless of the technical validity of the Orders of a person or of his Church, that was and is certainly true under the Anglican Use Pastoral Provision, and those of the laity entering its parishes; and the terms of the “Apostolic Constitution Anglicanorum Coetibus” and the Complementary norms do state that the clergy - and the laity as well - will still need to apply for entry into an Ordinariate individually, and comply with all normal procedures for entry into the Catholic Church, and the clergy will need to be re-educated even though they will otherwise be kept together. The actual conversions, therefore are still technically be individual. This, however, is irrelevant, as reunion with the Catholic Church must be for the right reason. Quoting Fr. Chori Jonathin Seraiah, a priest of the Traditional Anglican Communion (TAC) patiently awaiting the establishment of the U.S. Anglican Ordinariate to enter the Catholic Church wrote: Seeking communion with Rome is “not supposed to be because it is a nice thing to do, but only because it is the only thing to do - because it is right.”
Blessings,
Irl