The Southern Section (finally) posted the new playoff divisions, under its "competitive equity" approach, using the past two years of performance. On the one hand, Division 1 has a lot fewer teams than previously (42 now vs. ~70 before); on the other hand, it's even more loaded now.
See: http://cifss.org/wp-content/up...eballDivisions-1.pdf
and: www.latimes.com/sports/highsch...-20170127-story.html
The Trinity League has 5 teams in Division 1 (and its other team in D2), and the Mission League has 4 teams in Division 1 (and two others in D2) and Foothill League also has 4 teams in Division 1.
Edited to add: the playoff groupings are actually a ranking of the programs, from #1 to #489, so it was quite an undertaking.