Local Government Act 1993 No 30
Current version for 14 May 2020 to date (accessed 7 June 2020 at 19:18)
Chapter 10 Part 5 Section 293
293   Delayed by-elections
(1)  If the Minister is of the opinion that it would be impractical or inconvenient to hold a by-election as provided by section 292, the Minister may, by order published in the Gazette, appoint a subsequent Saturday for the by-election.
(2)  The subsequent Saturday must not be more than 28 days later than the day when the by-election should have been held.