City Hall has warned its inspectors, known as tessakit officers, to strictly enforce municipal laws or face punishment after some had told street vendors that the footpath clean-up campaign would ease when Governor MR Sukhumbhand Paribatra’s term ends. Wanlop Suwandee, chief adviser to the Bangkok governor, said an investigation into the behaviour of some tessakit officers had caused “grave concern” to the executive of the Bangkok Metropolitan Administration.