The work of the « Commission for the study of Territorial Integrity of Québec » (1967-1972), while specifically pertaining to Quebec's boundary and territorial problems, resulted in expliciting the existing relations between the legal, political, geographical and other aspects of the boundary phenomenon. Various considerations and conclusions emerge from this work and concern the different levels of boundaries, the two dimensions of territorial problems in a Federal context, the need for a new law of boundaries, the contribution of regional geography, the multidisciplinary analysis of border situations, and the functional approach to border problems.