14.—(1) For the purposes of section 16 of and Part I of Schedule 4 to the Act a condition subject to which a lessor has given his consent is to be taken to be reasonable in all circumstances if it is any of the following (or a condition to similar effect)—
(a)that the occupier must obtain any necessary planning permission and any other consent or permission required by or under any enactment;
(b)that the occupier must submit any plans or specifications for the alteration to the lessor for approval (provided that the condition binds the lessor not to withhold approval unreasonably) and that the work is carried out in accordance with such plans or specifications;
(c)that the lessor must be permitted a reasonable opportunity to inspect the work when completed; and
(d)that the occupier must repay to the lessor the costs reasonably incurred in connection with the giving of his consent.
(2) For the purposes of section 16 of and Part I of Schedule 4 to the Act in a case where it would be reasonable for the lessor to withhold consent, a condition that upon expiry of the lease the occupier (or any assignee or successor) must reinstate any relevant part of the premises which is to be altered to its state before the alteration was made is to be taken as reasonable.