In 1943, the interim chairman of the HSMBC, Frederic William Howay, urged his fellow Board members to consider a broader range of designations, and to correct the geographic and thematic imbalance in the designations. In particular, Howay encouraged the HSMBC to pay more attention to economic, social and cultural history, and he urged a moratorium on additional designations related to the War of 1812. In 1951, the Royal Commission on National Development in the Arts, Letters and Sciences highlighted the imbalances of the National Historic Sites program, urging a more ambitious program with more attention paid to architectural preservation. In 1955, the "Historic Sites and Monuments Act" was amended to allow the designation of buildings due to their age or design, resulting in a new focus on the designation of Canada's built heritage. The 1950s also marked the beginning of the "big project" era, which reached its apogee in the 1960s, in which the federal government invested significant funds in the restoration and reconstruction of high-profile National Historic Sites such as the Halifax Citadel, the Fortress of Louisbourg, the fortifications of Quebec City and the historic core of Dawson City.