Territorial authorities are the second tier of local government in New Zealand, below regional councils. There are 67 territorial authorities: 12 city councils, 53 district councils, Auckland Council and Chatham Islands Council. Six territorial authorities (Auckland Council, Nelson City Council, the Gisborne, Tasman, and Marlborough district councils and Chatham Islands Council) also perform the functions of a regional council and thus are unitary authorities. A unitary authority may also have local boards; currently only Auckland Council has them.