matters to be taken into account in deciding whether it is reasonable for A to take a step for the purposes of a prescribed provision of an applicable Schedule;

descriptions of persons to whom the first, second or third requirement does not apply.

circumstances in which it is, or in which it is not, reasonable for a person of a prescribed description to have to take steps of a prescribed description;

what is, or what is not, a provision, criterion or practice;

things which are, or which are not, to be treated as physical features;

things which are, or which are not, to be treated as alterations of physical features;

things which are, or which are not, to be treated as auxiliary aids.