The General Secretariat is supported in its duties by seven Regional Secretariats. They are groupings of cities that share cultural, linguistic or geographical affinities and/or have the same concerns and needs. Every member city of the OWHC is allowed to be part of one or more regions. The members of one region have to choose a city from among themselves as domicile for the Regional Secretariat, choose a Regional Coordinator and meet at least once a year. They serve as a link between the member cities of their particular region and the General Secretariat.