The Council was rather teaching on the necessity of the sacrament for salvation - the sacrament (with all the necessary conditions implied) or at least the desire
This is the point I am now trying to understand.
The term forced baptism is actually a misnomer, because the performance of a forced baptism is not a Baptism at all; no sacrament is conferred.
Without the votum of the recipient, the Sacrament of Baptism is not actually conferred.
The laver of regeneration = the Sacrament of Baptism actually conferred. In other words: . . . this transition, once the gospel has been promulgated, cannot take place without the
Sacrament of Baptism actually conferred or the desire thereof, as it is written: Unless a man is born again of water and the Holy Spirit, he cannot enter the kingdom of God (John 3:5).
The 1917 or Pio-Benedictine Code of Canon Law: in English Translation, published by Ignatius Press,
Third Book On Things, CANONS 726–1551, FIRST PART—On Sacraments, Title 1:
Canon 737
§ 1. Baptism, the gateway and foundation of the Sacraments, actually or at least in desire is necessary for all for salvation and is not validly conferred except by washing with true and natural water along with the prescribed formula of words.
The above is the 1917 Code of Cannon Law.
Now, here's the 1983 Code of Cannon Law:
https://www.vatican.va/archive/cod-iuris-canonici/eng/docuмents/cic_lib4-cann834-878_en.html#TITLE_I.
Can. 849 Baptism, the gateway to the sacraments and necessary for salvation by actual reception or at least by desire, is validly conferred only by a washing of true water with the proper form of words. Through baptism men and women are freed from sin, are reborn as children of God, and, configured to Christ by an indelible character, are incorporated into the Church.
For example, that is why Tanquerey states the following:
Manual Of Dogmatic Theology, 1959, by Tanquerey
Page 225:
https://archive.org/details/manualofdogmatic0002adta/page/224/mode/2upAfter the promulgation of the Gospel, Baptism of water is necessary by a necessity of means in re or in desire.
"in re" meaning the Sacrament of Baptism actually conferred.