by the end of November - but most likely it will be in 2015 the increase takes effect.
If they did it for 2014 there are several points of view on how you would make up the 12 team leagues:
a) no relegation, add Kura and Fury to Div 2 to complete your three 12 team leagues
b) relegate the bottom placed team in each division, and have a playoff between the 2nd bottom and 3rd and 4th placed teams in the lower division for 2 spots in the above league (for example for Premier League, Rewa down, and Ellerslie/Melville/North Shore to play off for 2 spots
c) promote the 3rd and 4th placed teams and keep the two relegated ones relegated - not my favourite scenario :-)
Anyway hopefully we should know soon..