Getting the original copy of a cultivation art required authorization from the president of the Order, and the Chief Librarian. Either that or the approval from the three vice presidents, and seven members of the spirit council, after which he would also need to sign a soul contract with a timed duration.
These measures were employed only when one wanted to take the original copy of the cultivation art out of the Main Library where they were stored. But if one wanted to read them there, the only thing required was for them to have clearance access to the level in which they were stored. They didn't require anybody's permission.
These measures were employed to preserve the integrity of those copies since there were treasures and artifacts in the library that were put in place to ensure it.