After the election of Georges-André Chevallaz to the Federal Council, Delamuraz was appointed Mayor of Lausanne, and from 1981 to 1983 was a member of the Government of the Canton of Vaud in charge of the Department of Agriculture, Industry and Trade. He belonged to the National Council from 1975 until 1983, and was for two years chairman of the control committee. He fought for Switzerland's membership of the European Economic Area and of the World Trade Organization, and played a decisive role in shaping the new Swiss agricultural policy.
after the election of georges-andré chevallaz to the federal council delamuraz was appointed mayor of lausanne and from 1981 to 1983 was a member of the government of the canton of vaud in charge of the department of agriculture industry and trade he belonged to the national council from 1975 until 1983 and was for two years chairman of the control committee he fought for switzerland's membership of the european economic area and of the world trade organization and played a decisive role in shaping the new swiss agricultural policy