Can a pilot be vectored off an ODP or assigned a lower altitude than the published altitude on an ODP?

The correct answer is that a pilot cannot be vectored off an Obstacle Departure Procedure (ODP) or assigned a lower altitude than what is published on the ODP until they reach or are above the Minimum Vectoring Altitude (MVA). This is due to safety considerations aimed at ensuring that the aircraft remains clear of obstacles while departing. ODPs are specifically designed to provide obstacle clearance during takeoff, and the altitudes specified are calculated to ensure safe navigation away from terrain or obstacles in the departure path.

The Minimum Vectoring Altitude serves as a safety threshold; below this altitude, air traffic controllers have limited ability to guarantee obstacle clearance because it may not factor in the specific terrain or obstacles in that area. Consequently, maintaining compliance with the ODP until at or above the MVA ensures that pilots can depart safely without the risk of colliding with any obstacles.

This understanding highlights the critical aspect of adhering to published procedures and altitudes to maintain safe operations in the airspace system.