A person is within Category 1 if the person is an owner, lessee, tenant (whatever the tenancy period) or occupier of the land.
A person is within Category 2 if the person—
is interested in the land, or
has power—
to sell and convey the land, or
to release the land.
An expression, other than "the land", that appears in subsection (2) of this section and also in section 5(1) of the Compulsory Purchase Act 1965 has in subsection (2) the meaning that it has in section 5(1) of that Act.
A person is within Category 3 if, should the order sought by the application be made and fully implemented, the person would or might be entitled—
as a result of the implementing of the order,
as a result of the order having been implemented, or
as a result of use of the land once the order has been implemented,
to make a relevant claim.
In subsection (4) "relevant claim" means—
a claim under section 10 of the Compulsory Purchase Act 1965 (compensation where satisfaction not made for the taking, or injurious affection, of land subject to compulsory purchase);
a claim under Part 1 of the Land Compensation Act 1973 (compensation for depreciation of land value by physical factors caused by use of public works);
a claim under section 152(3).
In this section "the land" means the land to which the application relates or any part of that land.