San Juan Basin Royalty Trust is an express trust. The principal asset of the Trust is Royalty. Its Royalty is carved from working, royalty and other oil and natural gas interests owned by Southland Royalty Company, the predecessor to Burlington Resources Oil & Gas Company LP (Burlington), in properties located in the San Juan Basin of northwestern New Mexico (Subject Interests). The Trustee of the Trust is Compass Bank. The function of the Trustee is to collect the net proceeds attributable to the Royalty, to pay all expenses and charges of the Trust and distribute the remaining available income to the Unit Holders. The Trust does not operate the Subject Interests and is not empowered to carry on any business activity. It is a widely held fixed investment trust (WHFIT) and is classified as a non-mortgage widely held fixed investment trust (NMWHFIT) for federal income tax purposes. As of December 31, 2016, 99% of the Trust's estimated proved reserves consisted of natural gas reserves.