I'll use V291 as an example. From INW to the dashed magenta line, V291 exists from the surface to 17,999 MSL (my red line). From the dashed magenta line, to the shaded magenta line, it exists from 700 AG to 17,999 MSL (my green line), and the remainder of V291 would be from 1200 AGL to 17,999...