Several meetings between all members of the legislative assemblies and the cabinets of the three provinces were conducted during the 1960s, with the result being several important regional cooperation agreements in the areas of health care, post-secondary and secondary education, and in regional intergovernmental coordination, particularly when dealing with Ottawa.

Several institutions were formed by the early 1970s to facilitate intra-regional cooperation, including the Council of Atlantic Premiers (CAP), and various organisations such