V2 source for the CCC section 818:
UNITATIS REDINTEGRATIO:
3. Even in the beginnings of this one and only Church of God there arose certain rifts,[19] which the Apostle strongly condemned.[20]But in subsequent centuries much more serious dissensions made their appearance and quite large communities came to be separated from full communion with the Catholic Church for which, often enough, men of both sides were to blame. The children who are born into these Communities and who grow up believing in Christ cannot be accused of the sin involved in the separation, and the Catholic Church embraces upon them as brothers, with respect and affection. For men who believe in Christ and have been truly baptized are in communion with the Catholic Church even though this communion is imperfect. The differences that exist in varying degrees between them and the Catholic Church- whether in doctrine and sometimes in discipline, or concerning the structure of the Church–do indeed create many obstacles, sometimes serious ones, to full ecclesiastical communion. The ecumenical movement is striving to overcome these obstacles. But even in spite of them it remains true that all who have been justified by faith in Baptism are members of Christ’s body,[21] and have a right to be called Christian, and so are correctly accepted as brothers by the children of the Catholic Church.[22]
- Are all obliged to belong to the Catholic Church in order to be saved?
All are obliged to belong to the Catholic Church in order to be saved.
- What do we mean when we say, “Outside the Church there is no salvation”?
When we say, “Outside the Church there is no salvation,” we mean that Christ made the Catholic Church a necessary means of salvation and commanded all to enter it, so that a person must be connected with the Church in some way to be saved.
- How can persons who are not members of the Catholic Church be saved?
Persons who are not members of the Catholic Church can be saved if, through no fault of their own they do not know that the Catholic Church is the true Church, but they love God and try to do His will, for in this way they are connected with the Church by desire.
169A:
What conditions are necessary in order that a person be a member of the Mystical Body in the full sense?
In order that a person be a member of the Mystical Body in the full sense, it is necessary that he be baptized, that he profess the Catholic faith, and that he neither separate himself from the Mystical Body nor be excluded by lawful authority.
169B:
How does a person separate himself from full incorporation in the Mystical Body?
A baptized person separates himself from full incorporation in the Mystical Body by open and deliberate heresy, apostasy, or schism.
169C:
How does a baptized person separate himself from full incorporation in the Mystical Body by heresy?
A baptized person separates himself from full incorporation in the Mystical Body by heresy when he openly rejects or doubts some doctrine proposed by the Catholic Church as a truth of divine-Catholic faith, though still professing himself a Christian.
Gorman, can you explain why it says
full incorporation?
Maria