for the final at Stade de France (though in 2016, the final was at Camp Nou in Barcelona due to conflict with UEFA Euro 2016), where the winner will be champions of the league and receive the Bouclier de Brennus. Before 2009–10, the playoffs format was identical to that of the English Premiership with the exception of neutral sites for the semifinals. Beginning in 2017–18, only the bottom club is automatically relegated to Rugby Pro D2. The second-from-bottom Top 14 side plays a one-off match against the runner-up of the Pro D2 playoffs for the final place in the next Top 14 season. Pro D2 adopted the Top 14 playoff system effective in 2017–18, though with all matches held at the higher seed's home field. The playoff champion earns automatic promotion; the runner-up enters a one-off match for potential promotion to Top 14. Previously, Pro D2 used a four-team playoff, involving the second- through fifth-place teams, to determine the second of two teams promoted to the next season's Top 14, with the regular-season champions earning automatic promotion. Under this system, the promotion semifinals were held at the home fields of the second- and third-place teams, and the promotion final was held at a neutral site. United Rugby Championship The United Rugby Championship (URC), originally known as the Celtic League and later as Pro12 and Pro14, adopted a four-team playoff starting with the 2009–10 season. The format was essentially identical to that of the English Premiership. Through the 2013–14 season, the final was held at a ground chosen by the top surviving seed, with the caveat that the venue must have a capacity of at least 18,000. In 2012–13, top seed Ulster could not use its regular home ground of Ravenhill for that reason (the ground was later expanded to meet the requirement). The league changed to using a predetermined site for its championship final in 2014–15. With the addition of two South African sides in 2017–18, the league split into two conferences and expanded its playoffs to six teams. The top team of each conference earns a bye into the semifinals, where they will host the winners of matches between the second- and third-place teams from the other conferences (with the second-place team hosting the third-place team from the opposite conference). After the 2020–21 season, both South African sides left the league and were replaced by the country's four former