10 Dec, 12:23
Ireland's John Lacey will referee his first ever RBS 6 Nations while Alain Rolland is also included in the Elite Panel in what is his last season.
Dolphin needed a last gasp winner to see off Dublin University 20-17 while second placed Old Crescent retained their position after winning 19-15 in Malone.
Third placed Thomond won 22-20 at home to Portadown while Bective Rangers lost for the first time at home this season, going down 13-8 to Barnhall. UCC won the Cork derby beating Sunday's Well 15-3 at The Mardyke.