South Australia in accordance with the provisions of the Constitution Act 1934 (SA). Labor sought to have the redistribution order quashed and have the Boundaries Commission make a fresh redistribution. The Grounds of Appeal were stated to relate to the Commission's interpretation of section 77 relating to the number of electors in each electoral district, with the redistribution reducing the number of voters in rural seats and increasing the number of voters in metropolitan seats, though still within the one vote, one value 10 percent tolerance. The Supreme Court appeal was rejected on 10 March 2017. Labor considered but decided against an appeal to the High Court. Post-redistribution pendulum Below post-redistribution margins listed were calculated by the South Australian Electoral Districts Boundaries Commission, and differ somewhat from those calculated by the ABC's Antony Green. The EDBC is the only redistribution authority in Australia that is required to examine voting patterns in drawing electoral boundaries, and in doing so, assume that the proportion of each party's vote in the declaration vote (postal, pre-poll and absent votes) is evenly distributed across the whole of each former electorate. Antony Green's margin estimates are more accurately calculated using declaration votes from the redistributed polling booths. Retiring members are shown in italic text. Retiring MPs Labor Michael Atkinson MHA (Croydon) Paul Caica MHA (Colton) Steph Key MHA (Ashford) Jennifer Rankine MHA (Wright) Jack Snelling MHA (Playford) Leesa Vlahos MHA (Taylor) Gail Gago MLC John Gazzola MLC Liberal Mark Goldsworthy MHA (Kavel) Steven Griffiths MHA (Goyder) Michael Pengilly MHA (Finniss) Isobel Redmond MHA (Heysen) Mitch Williams MHA (MacKillop) Independent Martin Hamilton-Smith MHA (Waite) Polling The July to September 2014 Newspoll saw Labor leading the Liberals on the two-party preferred (2PP) vote for the first time since 2009. The October to December 2015 Newspoll saw Marshall's leadership approval rating plummet 11 points to 30 percent, the equal lowest Newspoll approval rating in history for a South Australian Opposition Leader since Dale Baker in 1990. The first state-level Newspoll to be conducted in two years, in late 2017, did not publish a 2PP figure, claiming that calculating it had become difficult due to the large third-party primary vote of SA Best. Roy Morgan ceased publishing a 2PP figure from January 2018. Essential polling's 2PP figures were calculated with approximated SA Best preference flows of 60/40 to Liberal/Labor. See also Candidates of the South Australian state election, 2018 Members