Theoretically, your 504 or IEP test accommodations port as is starting Jan. 1, 2017. How and if it is implemented is a wait and see. Cut and paste link into browser.
College Board Simplifies Request Process For Test Accommodations (see announcement for details, details, details)
collegeboard.org/releases/2016/college-board-simplifies-request-process-for-test-ccommodations