It took the rule book to decide the crucial second spot in the Hamersley Cup senior rugby semi-finals.
Waimate and Harlequins both scored bonus point wins on Saturday to finish tied on 47 competition points after 14 games.
Harlequins however advanced with a superior points differential, 241 to 109, after they beat each other once in the two round robin games.
The results mean Celtic will host Harlequins in the double life semi-final at Alpine Energy Stadium.
The winner will advance straight to the grand final on July 25, while the loser faces the winner of third and fourth teams play-off.
Temuka will have to travel to Waimate in their sudden death match up.
The Magpies have beaten Waimate twice this season but it was only by three points last time they met so could go either way.
In the bottom four play-off Mackenzie finished top and will host Old Boys, while wooden spooners Geraldine will travel to Pleasant Point in their sudden death match-up
Waimate had their bonus point wrapped up before halftime but took the foot off the accelerator and Old Boys scored three quick tries to close the gap to 43-34 at fulltime.
Waimate were also desperate for four tries and got them before halftime.
They then made a raft of changes and Old Boys, whose standouts were Pangi Iketau and Danny Wilson, lifted their game to close the gap.
For Waimate second five Miles Medlicott was outstanding and is now a key player in his side’s fortunes going into the sudden death semi.
Loose forward Loni Toumohuni is another finding form at the right end of the season while prop Tokomata Fakatava also had a strong game.
Waimate had their biggest win of the season in a match they needed full points from to assure the defending champions a position in the top four and with Jade Halkett leading the way with 5 tries made no race of it on their way to a 69 – 0 win over Old Boys. Next week it looks like a tough battle in their sudden-death playoff up against Celtic but will want to be like the Highlanders and turn their two round-robin losses into a win when it matters!