Hallvard Trætteberg (1898–1987), a leading specialist in heraldry, was commissioned to design the official coat of arms of Stavanger, a work that lasted from the end of the 1920s until approved on 11 August 1939. His design is also used as the city's arms, flag, and seal. The coat of arms is based upon a seal which dated 1591. It shows a branch of vine ("Vitis vinifera"). Which leaves and branch type that is depicted on the coat of arms has been hotly debated. The original meaning and representation of the vine remains unknown. The Old Norse form of the name was "Stafangr". The origin of the name has been discussed for decades, and the most used interpretation is that it originally was the name of the inlet now called Vågen, which was the original site of the city, on the east shore of the bay. The first element of the name is "stafr" meaning 'staff' or 'branch'. This could refer to the form of the inlet, but also to the form of the mountain Valberget ("Staven" meaning 'the staff,' is a common name of high and steep mountains in Norway). The last element is "angr" meaning 'inlet, bay'. Facing the North Sea, Stavanger has always been economically dependent on its access to the sea. All municipalities in Norway, including Stavanger, are responsible for primary education (through 10th grade), outpatient health services, senior citizen services, unemployment and other social services, zoning, economic development, and municipal roads. The municipality is governed by a municipal council of elected representatives, which in turn elect a mayor. The municipal council "(Kommunestyre)" of Stavanger is made up of 67 representatives that are elected to four year terms. Currently, the party breakdown is as follows:  The municipality of Stavanger is located in a coastal landscape, bordering the sea to the west and Boknafjorden in the northeast. The Byfjorden and Gandsfjorden run along the east side of the city. It is part of the Low-Jæren, a flat area of land consisting mostly of marsh, sand, and stone aur, that ranges from Ogna River in the south to Tungenes in the north; it is the northernmost part that includes Stavanger. The majority of the municipality lies between in elevation. The landscape has a distinctive appearance with rocks and hills where there is no settlement or agriculture.