The Church Educational System (CES) Honor Code is a set of standards by which students and faculty attending a school owned and operated by the Church of Jesus Christ of Latter-day Saints (LDS Church) are required to live. The most widely known university that is part of the Church Educational System (CES) that has adopted the honor code is Brigham Young University (BYU), located in Provo, Utah. The standards are largely derived from codes of conduct of the LDS Church, and were not put into written form until the 1940s. Since then, they have undergone several changes. The CES Honor Code also applies for students attending BYU's sister schools Brigham Young University–Idaho, Brigham Young University–Hawaii, and LDS Business College.