If an aircraft departing on a published Standard Instrument Departure (SID) is assigned a radar vector by ATC that takes it off the lateral track of the SID, what is the status of the published SID altitude and speed constraints?

1. The SID route and its vertical/speed profiles are cancelled; the controller must issue explicit level and speed clearances
2. The aircraft must continue to climb and level off at all SID profile altitudes while on the vector heading
3. The pilot must immediately declare an emergency and turn back to the SID track
4. The SID speed limits remain active but the aircraft must descend to the minimum vectoring altitude