The provisions of this Part and Parts II and III apply in relation to a person who has had a disability as they apply in relation to a person who has that disability.

Those provisions are subject to the modifications made by Schedule 2.

Any regulations or order made under this Act may include provision with respect to persons who have had a disability.

In any proceedings under Part II or Part III of this Act, the question whether a person had a disability at a particular time (“the relevant time”) shall be determined, for the purposes of this section, as if the provisions of, or made under, this Act in force when the act complained of was done had been in force at the relevant time.

The relevant time may be a time before the passing of this Act.