It's a "on the one hand" but "on the other hand" declaration.
This is a good example of the problem we have with Catholic doctrine. It seems that it depends on WHICH document we look at as to what the Church believes/teaches.
As opposed to Scripture, which states simply "That if thou shalt confess with thy mouth the Lord Jesus and shalt believe in thine heart that God hath raised Him from the dead, thou shalt be saved." (Rom. 10:9). "For WHOSOEVER shall call upon the name of the Lord shall be saved." (Rom. 10:13).