For general qualifications use the online tool, Access Arrangements Online, accessed via Interchange. See the JCQ website for more information. You must record whether the candidate has a medical condition or a temporary injury.
In all cases, consider the nature of the assessment being undertaken. For example, marks cannot be awarded to a candidate for work undertaken by a scribe or practical assistant in the realisation of design, performance and artwork.
Similarly, a human reader is not allowed to read questions testing reading in GCSE English Language papers (although a computer reader is permitted).
Further restrictions can be found in the JCQ Access Arrangements document.