The Ripple mist sect had different barriers for security in different sections of the sect. This was to prevent those who did not have access or were not authorized to enter those areas from proceeding.
Only if one had the right identity token would one be able to enter that area. But there were still some peculiarities to this. There were several areas that were considered to be public and did not need an identity token except for the most basic one to enter.
This would be the token needed for a person to enter the sect's boundaries. Lin Mu did not need this, as the formation pretty much recognized him as part of the natural 'fauna'. As for Jing Luo, he already had a fake identity token that he had made during the time when Lin Mu was absorbing the spirit Qi of the minor plane.
