Karaka's Kurtis Lilly is third overall, 43 points behind Broad, and he will be keen to move up or at least just protect his podium position.
With a maximum 75 points on offer on Sunday, riders such as Beachlands' Blake Gillard, Feilding's Tony Cvitanovich and Papakura's Sean O'Connor could also move themselves up and onto the 125cc podium.
Mathematically speaking, if Takaka's Hamish Harwood can beat Australian visitor Jed Beaton or at least finish no worse than one place behind Beaton in their three remaining races, he'll win the MX2 (250cc) title.
With a maximum 75 points available in this class too, any one of another six or seven riders could also move themselves onto the podium.
Currently third overall, Waitakere's Ethan Martens will have his work cut out preventing Mangakino's Kayne Lamont, Rangiora's Micah McGoldrick and Reporoa's Hadleigh Knight, among others, from snatching away his podium spot.
In the MX1 class this weekend, the maths charts get thrown out the window.
Aside from intervention by a rogue sniper, an outbreak of the plague or a tornado strike, one of just three men can win this premier title.
Mount Maunganui's defending national MX1 champion Cody Cooper and Australian pair Todd Waters and Dean Ferris are locked in an incredibly tight three-way battle.
Just five points separate this trio and the difference in each race between finishing first and third is exactly five points. It doesn't get much tighter than that.
So there you have it, the championship status in a nutshell.
Racing starts about 10am.