I've been harping on these themes for some time. One being it takes an egoic-rational operation with the capacity of deliberative and selective attention to 'meditate.' Aka, the fifth aggregate of 'consciousness.' Or in Damasio's terms, the narrative self. Now the monitoring comes from the 3rd aggregate, this base or core awareness but one with ipseity, unlike gross body awareness or slightly more subtle emotional feeling tone. To put it in Damasian, the body and emotions obviously have attention but lack human ipseity. And after it emerges it translates body and emotions in particularly human ways distinct from the animal world, with which we share these aggregated 'levels.'
Now to complicate this further, as if that isn't enough, if Luhmann is right the aggregates are not transcended and included levels but are separate systems altogether that nonetheless interact via structural coupling. And as suggested earlier, perhaps individually they continue to undergo development on their own given their continual coupling as a more complex assemblage. It's not so much that the higher integrates the lower but that equivalent and separate systems synergize in a more integrative coupling in a strange, democratic mereology.
See this post and a few following for Luhmann per the last paragraph.