Plant Limit ???

Hi,
I'm an MMJ patient here in north cali. I read that the plant number guideline is 6mature/12immature. What I need to know is does this mean I can have 6 plants in flowering and 12 in veg at the same time? Or does it mean I can just have 6 mature going and that's it. Can some one please clariffy this for me? Any help would be much appreciated. I'm trying to do everything within state limit's. Thanks in advance..........
Jay