In that loss last year the South Zone drew first blood before the North replied with a try to captain Buster Tahere, leaving a deadlock at halftime.
The North Zone came out stronger in the second half, a try to Kaeo's Matarae Tauroa, and subsequent conversion by Moerewa halfback Kadin Te Nana extending the lead to 12-5.
Keeping up a best-form-of-defence-is-attack policy, the North pressure resulted in a penalty converted by Okaihau 18-year-old Thomas Smith from the sideline with time nearly up to put the seal on a rare and remarkable victory.
The match finished about 20 minutes earlier than planned after a South Zone player broke a leg in sickening fashion in the first half.
Match schedule
*10.30am: Under-14 North Zone v South Zone.
*11am: Under-16 North Zone v South Zone.
*11.45am: Under-19 North Zone v South Zone.
*1pm: Senior North Zone v South Zone.