 Between 1949 and 1953, the four provincial administrations introduced systems of registering civic arms to protect them against usurpation.The defence force established its own heraldry office in 1954.In 1955, an inter-departmental conference recommended the formation of an official heraldic authority, and a committee appointed in 1956 recommended adopting the Swedish model, of a nominated council and an executive bureau, under the auspices of the state archives service.