In Texas the identification and instruction of students with dyslexia and related disorders is mandated and structured by two statutes and one rule. Texas Education Code (TEC) §38.003 defines dyslexia and related disorders, mandates testing students for dyslexia and providing instruction for students with dyslexia, and gives the State Board of Education authority to adopt rules and standards to administer testing and instruction. Chapter 19 of the Texas Administrative Code (TAC) §74.28 outlines the responsibilities of districts and charter schools in the delivery of services to students with dyslexia. Finally, §504 of the Rehabilitation Act of 1973 establishes assessment and evaluation standards and procedures for students. Section 504 procedures are implemented when it is determined that dyslexia substantially limits learning.