NTL is governed by a Board of Directors.

Members of the Board are either elected from the membership in an annual nomination process, or appointed by the Chair of the Board to replace members. The Board should have at least six elected members and up to a maximum of twelve members. At the discretion of the Board Chair and the Board, included in the 12 maximum, the Board can elect to have two external members who serve to provide the Board with a stakeholder perspective in its decision-making process. Board terms are three years, and Board members can serve for two consecutive terms for a maximum of six years. The Board Chair serves for two years. In addition to the Board's fiduciary and administrative responsibilities, this group also sets the vision and direction for the organization, including determining strategy and tactics, and manages the President who is the Chief Executive Officer.