In 1973 he was a professor of law at Osgoode Hall Law School, called upon by the British Columbia government to assist in drafting legislation which brought their Labour Relations Board into existence.
"[4] He subsequently became the MacKenzie King Visiting Professor of Canadian Studies, Harvard University in 1978[5] and the Henry J.
An article Weiler wrote in 1980 for the Dalhousie Law Journal recommended inserting a non obstante (or notwithstanding) clause in the Canadian Charter of Rights and Freedoms.
This concept was shared with Jim Matkin, British Columbia deputy minister of inter governmental affairs, who shared this with other provinces in a no-author text during interprovincial negotiations toward constitutional change in Canada.
[8] During the Kitchen Accord this concept reappeared and became one of the compromises that led to a patriated Canadian constitution.