We'll treat it like one of the national championship races:
20 points to the first overall team, down to 1 point for the 20th overall team.
A bonus of 4 points for the first vets team down to 1 point for the 4th vets team.
20 points to the first womens team, down to 1 point for the 20th womans team.
Plus a point for finishing.
So if Calder Valley vets are 3rd overall and 1st vets (just saying...) they'll get 18 points for their overall position plus 4 points as first vets plus a point for finishing = 23 points.