The exact purpose for which the land so coloured is reserved
differs if it is vacant land within the definition of that expression
or built-up land. The expression " built-up land " is defined by
cl. 8 of the scheme to mean all land other than vacant land. " Vacant
land " is defined by the clause to mean all land upon which immed-
iately before the appointed day, that is to say 27th June 1951,
there are no buildings or no buildings but fences, green-houses,
conservatories, garages, summer-houses, private boat-houses, fuel
sheds, tool houses, cycle sheds, aviaries, milking bails, hay-sheds,
stables, fowl-houses, pig sties, barns or the like. If the land is vacant
within the meaning of this definition then it is reserved for the
purpose of parks and recreation areas: cl. 10. If land within an
area coloured dark green on the scheme map is built-up land it
cannot, without the consent of the responsible authority, be used
for any purpose other than the purpose for which the land was
used immediately before the appointed day: cl. 14. Whether the
land is vacant land or built-up, if the result of the scheme is that
the erection of any building or the carrying out of any work of a
permanent character or the making of any permanent excavation
is prohibited or in the case of any land reserved on which the
responsible authority has refused to approve of the erection of a
building or the carrying out of any work of a permanent character
or the making of any permanent excavation, the owner by notice
in writing may require the responsible authority to acquire such
land: cl. 17. Upon vacant land within the area coloured dark
green no person may erect a building or carry out work of a per-
manent character or make any permanent excavation other than
a building or work or excavation required for or incidental for the
purpose for which the land is reserved ; and no person may spoil
or waste such land so as to destroy or impair its use for the purpose
for which it is reserved : cl. 11 (1). There is a qualification enabling
the responsible authority to approve of the erection of buildings
and the carrying on of works or excavation of land if the reason
for which it is reserved cannot be carried into effect immediately
after the appointed day, but the approval may be made subject