ork began on Eleanor Milne's designs for the British North America Act (now renamed the Constitutional Law of 1867) in 1974. The twelve sculptures, each measuring six feet by four feet by two feet thick, were done on three panels installed in the House of Commons Chamber beginning in 1978. In her designs for the sculptures, Eleanor Milne integrated the three levels of Canada's history she considers most important—the historical, the sociological and the philosophical. 

The fact that the British North America Act consists of ideological concepts made it difficult for Milne to translate into physical representations. She chose to depict the ideas using Canada's people as symbols. Language is shown as a sea-bound man reaching out to the Hawk, symbolizing English, and the Dolphin, symbolizing French. The Senate is depicted through an intensive discussion of senators, suggested by Maurice Joanisse. Tax includes a family to represent the fact that like death, no one escapes taxation. The symbols of all the provinces are on the panel for Confederation, and on the House of Commons panel, gargoyle Members of Parliament overlook real-life members. These real-life Members of Parliament included Stanley Knowles, a New Democrat from Winnipeg, who created debate in a 1980 article in Le Devoir, claiming that Milne had misrepresented Canada's past by including a riot scene in the panel carvings. 

Other carvings include Education, Communications, Franchise (the Vote), Criminal Law, Civil Law (shown here), the Governor-General's Speech from the Throne and Freedom of Speech. The only panel depicted by a single figure is Freedom of Speech which is represented by a woman. While researching Canada's constitutional documents for the design of the British North America Act sculptures, Milne noticed that women were not very prominent in the history, and she took this opportunity to dedicate an entire panel to a female figure.