Authorities of the northern province of Ninh Binh have said they will take action against aggressive demands for tips by rowers at Tam Coc. Hoang Van Phong, deputy director of the provincial Department of Tourism, admitted rowers were ripping off tourists by asking for extra tips but claimed that it was not common. Provincial authorities are investigating the case to find out the violators who would be strictly punished. Tam Coc-Bich Dong tourist site According to Phong, the management board of Tam Coc-Bich Dong tourist site has been tasked with tightening control over the rowers. Any violator will be seriously punished. Speakers will be installed at Dinh Cac and Cuoi Hang wharves to issue warnings. Regulations on boat rides will be also displayed there and boat rowers have to sign in a commitment for conforming to the rules. Many tour firms have had to apologise for the unpleasant experience even though boat rides are managed by the local management board.