Sch 21 para 6
(1) Regulations may make provision as to circumstances in which a landlord is taken for the purposes of this Schedule to have— (a) withheld consent; (b) withheld consent reasonably; (c) withheld consent unreasonably. (2) Regulations may make provision as to circumstances in which a condition subject to which a landlord gives consent is taken— (a) to be reasonable; (b) to be unreasonable. (3) Regulations may make provision supplementing or modifying the preceding paragraphs of this Schedule, or provision made under this paragraph, in relation to a case where A's tenancy is a sub-tenancy. (4) Provision made by virtue of this paragraph may amend the preceding paragraphs of this Schedule.