28Discharge of returning officer's functions in England and Wales
(1)In England and Wales the duties of the returning officer for a parliamentary election (except those mentioned in subsection (2) below) shall be discharged, as acting returning officer—
(a)in the case of a constituency for which the chairman of a district council or the mayor of a London borough is returning officer by virtue of section 24(1) above, by the registration officer appointed by that council;
(b)in the case of any other constituency, by such registration officer as may be designated in an order made by the Secretary of State.
(2)The duties excepted from subsection (1) above are—
(a)any duty imposed on a returning officer under rule 3 of the parliamentary elections rules; and
(b)any duty so imposed under rule 50 of those rules which the person (if any) who for the time being holds the office of returning officer reserves to himself and undertakes to perform in person.
(3)The returning officer shall give to the acting returning officer written notice of any duties which he reserves to himself under paragraph (b) of subsection (2) above, and that paragraph shall, in the case of any election, apply to the duties (if any) of which the notice is so given not later than the day following that on which the writ is received, and to no others.
(4)In the discharge of the duties imposed by subsection (1) an acting returning officer has all the powers, obligations, rights and liabilities of the returning officer under this Act, and this Act has effect accordingly.
(5)An acting returning officer has power to appoint deputies to discharge all or any of those duties, but the appointment requires the Secretary of State's approval where the deputy's powers extend—
(a)to matters other than the receipt of nomination papers and connected matters ; or
(b)to the taking or deciding of objections to nomination papers.
(6)Section 25 of the [1887 c. 55.] Sheriffs Act 1887 (death of sheriff) does not authorise the under-sheriff to discharge the duties of returning officer, and upon a sheriff's death the acting returning officer shall discharge all the sheriff's duties as returning officer until another sheriff is appointed and has made the declaration of office.