Frogn Municipal Council attempted to veto the development in November 1995, by demanding that either two or no tubes be built. The ministry stated that they would if necessary pass state zoning laws to avoid such disruptions. The municipal opposition rested in part on opposition to building a new road through a recreational forest area and the auxiliary road would come too close to the settlements at Heer. After the municipal council voted against rezoning, a new zoning plan was thus legislated by the ministry and Frogn Municipal Council lost further ability to participate in the planning. The ministry also decided that the road would be designated National Road 23 and be treated as a trunk route. The tunnel was expected to see a quintupling of the traffic compared to the ferry service. By June 1996 commitments from the Labour and Conservative Party ensured a majority in Parliament for the link. The project was passed by Parliament on 13 December 1996, against the votes of the other parliamentary parties.