include transgender, gender fluid, and non-binary members (). Ironically, the integration that Tau Delta Phi pioneered may have been a factor in chapter loss during the 's through 's. That period showed a marked contraction of chapters coinciding with the period's adoption of integration by virtually all, if not all, other national fraternities. Tau Delta Phi hired an executive director for the first time in decades, in . Since that time staff and volunteers have spearheaded a number of expansion projects, aimed to rebuild the fraternity. Fraternity structure The grand chapter of Tau Delta Phi Fraternity is the highest power. It convenes at every national convention and governs every aspect of the fraternity. It is composed of the executive council members, two delegates from each chartered chapter, the past living grand consuls, and one delegate from every alumni chapter in good standing. The executive council is the board of directors of the fraternity. in between conventions, the Executive Council governs the fraternity. It is composed of all the grand officers and members of the board. The Tau Delta Phi Management Company is a for-profit arm of the fraternity. It manages the finances of and provides support services to each House Corporation and issues a service contract for those services. The Chapter House Corporation Each chapter should have a house corporation. House Corporations evaluate the property needs of each chapter and try to either rent, lease, or purchase a chapter house for each chapter. Each House Corporation has its own board of directors which are usually composed of fraters from their respective chapter. The Tau Delta Phi Foundation is the nonprofit arm of the fraternity which seeks to support the educational mission of Tau Delta Phi and offer scholarships and grants to fraters of the fraternity. The executive council The executive council of Tau Delta Phi is the supreme legislative authority between conventions. The board is composed of all the grand officers and the members of the board. The executive council is responsible for governing the fraternity and developing strategic plans to meet educational and brotherhood outcomes. The national office In 2012, the executive council hired its first full-time professional executive director in three decades. In 2014, the national office hired a graduate assistant and chapter consultant, who is able to visit chapters and colonies, and provide support for educational programs. The national office is host to the annual leadership conference,