While studying FAA's Instrument Procedure Handbook, I noticed these minimum performance requirements for obstacle clearance, when a SID or ODP is absent for a particular runway:
-- Cross the departure end of the runway (DER) at least 35ft AGL.
-- Climb to 400ft above the DER before turning.
-- Maintain a climb of at least 200ft per nautical mile (FPNM) until reaching minimum IFR altitude.
The minimum IFR altitude is 1000ft above obstacles, or 2000ft in mountainous areas.
I was wondering if the last rule, regarding a constant climb with a minimum climb gradient of 200 ft/NM (if no other is specified) until reaching minimum IFR altitude, applies also in case of SIDs, or it is up to pilot's or ATC's judgement to establish a minimum climb gradient for a particular, arbitrary portion of the SID route.
In other words, if for a particular SID it is mentioned "climb gradient of X ft/NM until Y altitude", then after reaching Y altitude is the pilot allowed to fly with whatever climb gradient he deems necessary, even if it is less than 200 ft/NM?
p.s. I have to give some credit to this question, though it is not a duplicate since it asks if a minimum performance applies in case of the absence of a SID or ODP. I am asking if a minimum performance (especially the last rule regarding the minimum IFR altitude) applies when the pilot is following a SID.