For the purpose of making purchases with funds appropriated to it, the Teacher Retirement System of Texas (TRS) adopts by reference the rules of the Comptroller of Public Accounts (comptroller's office) in 34 Texas Administrative Code Chapter 20, Subchapter D, Division 1 (relating to the Historically Underutilized Business Program). The rules of the comptroller's office are in the Texas Administrative Code, which is on the Internet website of the Office of the Secretary of State, Texas Register Division at: www.sos.state.tx.us/tac/index.shtml.