The organization is administered through a National Council with a National President at the helm. Working within the frame of the Act of Parliament No. 10 of 1986, a special body of rules was adopted by the membership in 1994 to govern the activities of the National Council. This Council brings together the expanding services and promotes a sense of uniformity within the branches.

Each branch is represented at the National Council enjoying one vote each. The general powers of the National Council include the right to monitor and evaluate the activities of all the Branches to ensure that they do not contravene the aims and objectives of Sri Lanka Sumithrayo. The National Council is elected at the Annual General Meeting where an Annual Report is presented by the Chairperson, with an audited statement of accounts.