During practice approaches on an IFR clearance, does ATC expect me to perform my verbally assigned climb out instructions at 400 AGL even if there is a published DP? ie. "climb to 1500 before turning right." If so, ATC is taking responsibility for obstacle clearance when they assign me a heading and altitude to fly after completion of touch and go? I can't seem to get a solid answer out of the FAR/AIM. Thank you.