This paragraph applies where the contract-holder under the occupation contract seeks the landlord’s consent to adding a joint contract-holder under section 49.

If the landlord considers that the probable effect of giving consent is to substantially lengthen the period during which the occupation contract is likely to continue in force, it is reasonable for the landlord to impose the condition mentioned in sub-paragraph (3).

The condition is that the joint contract-holder is to be treated for the purposes of this Act as a priority successor or as a reserve successor in relation to the occupation contract.