The Constitution of the Mannar Friendship Association (MFA) is the foundational framework for the Toronto Chapter. Adopted on February 4, 2005, it registers the group as an Ontario Not-for-Profit Corporation. It exists to foster community spirit, culture, and charitable initiatives among those connected to the Mannar District in Sri Lanka.

The document defines governance, membership rights, democratic voting, and financial transparency. It outlines the specific duties of the five-person Executive Committee and the oversight role of the Board of Directors. To adapt to changing needs, the text has undergone major revisions in 2008 and 2015 to update leadership structures and financial policies.