Gawd, that is obtuse.
15 second pause/slide for 15 minutes or less of deco?
30 second pause/slide for more than?
O2 use if available? *** does that even mean? As in, "if you still have O2 available, use it on the 6 minute ascent, if you ran out of it, use something else. Or, if you are using O2, ascend on it from 20 feet (duh)."
Follow planned ascent until 20 feet? Then what? Follow the unplanned ascent?
It's worse than that. I can't even figure out what's being recommended for the ascent if you have between 15-30 minutes of deco (which is basically all my T1 dives)!