From the Office for Civil Rights (OCR) Website
Section 504 and Title II of the ADA protect elementary, secondary, and postsecondary students from discrimination. Nevertheless, several of the requirements that apply through high school are different from the requirements that apply beyond high school.
An individualized education program (IEP) or Section 504 plan, if you have one, may help identify services that have been effective for you. This is generally not sufficient documentation, however, because of the differences between postsecondary education and high school education. What you need to meet the new demands of postsecondary education may be different from what worked for you in high school. Also, in some cases, the nature of a disability may change.
Schools may set reasonable standards for documentation. Some schools require more documentation than others. They may require you to provide documentation prepared by an appropriate professional, such as a medical doctor, psychologist, or other qualified diagnostician. The required documentation may include one or more of the following: a diagnosis of your current disability, as well as supporting information, such as the date of the diagnosis, how that diagnosis was reached, and the credentials of the diagnosing professional; information on how your disability affects a major life activity; and information on how the disability affects your academic performance. The documentation should provide enough information for you and your school to decide what is an appropriate academic adjustment.
If the documentation that you have does not meet the postsecondary school’s requirements, a school official should tell you in a timely manner what additional documentation you need to provide. You may need a new evaluation in order to provide the required documentation. The appropriate academic adjustment must be determined based on your disability and individual needs.
Moreover, you will have responsibilities as a postsecondary student that you do not have as a high school student. OCR strongly encourages you to know your responsibilities and those of postsecondary schools under Section 504 and Title II. Doing so will improve your opportunity to succeed as you enter postsecondary education.
In providing an academic adjustment, your postsecondary school is not required to lower or substantially modify essential requirements. For example, although your school may be required to provide extended testing time, it is not required to change the substantive content of the test. In addition, your postsecondary school does not have to make adjustments that would fundamentally alter the nature of a service, program, activity, or that would result in an undue financial or administrative burden. Finally, your postsecondary school does not have to provide personal attendants, individually prescribed devices, readers for personal use or study, or other devices or services of a personal nature, such as tutoring and typing.
For more information about the transition to post-secondary education: https://www2.ed.gov/about/offices/list/ocr/transitionguide.html