64B. (1) For the purposes of this Chapter, a Part 4 tenancy and any further Part 4 tenancy entered into following the expiration of—

(a) the said Part 4 tenancy, or

(b) a further Part 4 tenancy,

shall be treated as one tenancy, and references in this Chapter to duration of tenancy shall be construed accordingly.

F145[(1A) (a) For the purposes of this Chapter—

(i) a new tenancy referred to in subsection (4) of section 5 of the Residential Tenancies (Amendment) Act 2021 of a dwelling created immediately following the expiration of a relevant Part 4 tenancy of that dwelling, and

(ii) that relevant Part 4 tenancy,

shall be treated as one tenancy, and references in this Chapter to duration of tenancy shall be construed accordingly.

(b) For the purposes of this Chapter—

(i) a new tenancy referred to in subsection (4) of section 5 of the Residential Tenancies (Amendment) Act 2021 of a dwelling created immediately following the expiration of a relevant further Part 4 tenancy of that dwelling,

(ii) that relevant further Part 4 tenancy, and

(iii) any Part 4 tenancy or further Part 4 tenancy of the dwelling concerned immediately preceding that relevant further Part 4 tenancy,

shall be treated as one tenancy, and references in this Chapter to duration of tenancy shall be construed accordingly.

(c) In this subsection—

"relevant Part 4 tenancy" means a Part 4 tenancy that—

(a) came into being before the commencement of section 5 of the Residential Tenancies (Amendment) Act 2021, and

(b) expired on or after such commencement; and

"relevant further Part 4 tenancy" means a further Part 4 tenancy that—

(a) came into being before the commencement of section 5 of the Residential Tenancies (Amendment) Act 2021, and

(b) expired on or after such commencement.]

(2) This section is without prejudice to subsection (2) of section 61.]