(1) In a conveyance of any class referred to in subsection (2) there are implied, in addition to the covenants referred to in section 80(1), the covenants specified in relation to that class in Part 3 of Schedule 3, and those covenants are deemed to be made -
(a) by the person, or by the persons jointly and severally, if more than one, so specified in relation to any class of conveyance,
(b) with the person, or with the persons jointly and severally, if more than one, who is the other party, or are the other parties, to the conveyance,
and have the effect specified in Parts 1 and 3 of Schedule 3.
(2) The classes of conveyance referred to in subsection (1) are -
Class 6: A conveyance (other than a mortgage) for valuable consideration of -
(a) the entirety of the land comprised in a lease, or
(b) part of the land comprised in a lease, subject to a part of the rent reserved by the lease which has been, or is by the conveyance, apportioned with the consent of the lessor,
for the residue of
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