The material states that the purpose of original OT IV is to proof up a being against any possibility of being re-implanted in the future. If one is properly set up for the level and does it well, the level will most definitely provide that ability for the being. The end product of original OT IV stated in the book Scientology 0-8 is, "Certainty of self as a being."
This level was discontinued by the Church of Scientology in 1985, but never cancelled. it is now being delivered outside the Church of Scientology in the Independent field.