Nothing in section 62 affects any right of the head landlord under section 61(6) (power to treat sub-occupation contract as periodic standard contract).
Nothing in section 62 makes the head landlord liable to the sub-holder in respect of any breach of the sub-occupation contract committed by the contract-holder.
Nothing in section 62 makes the sub-holder liable to the head landlord in respect of any breach by the sub-holder of the sub-occupation contract that occurred before the head contract ended.
But the head landlord may be liable to the sub-holder, or the sub-holder to the head landlord, to the extent that any breach of the sub-occupation contract continues after the head contract ends.
Subsections (3) and (4) do not affect any power conferred on the head landlord by the sub-occupation contract.