But none of that actually defines aerobatic flight
an intentional maneuver involving an abrupt change in an aircraft's attitude, an abnormal attitude, or abnormal acceleration, not necessary for normal flight.
is so wishy-washy - perhaps deliberately so - and the section on parachuting isn't relevant, it just mentions attitude and AoB and then gives exceptions for flying training - why would you bury a theoretically wide-ranging and important limit, deep in a section about parachuting?