The Kerala High Court on Thursday sought an explanation from the state for restricting deputation period of officers in the Vigilance Wing of the Travancore Devaswom Board (TDB), saying a system without vigilance cannot be permitted. The high court said that there was "absolutely no justification" for restricting the deputation period of three officers of the vigilance wing to January 20, 2022 when even the state's police chief in September last year had recommended extension of their term for one year.