Rotor engagement max steady wind 50kts
Vmin IMC 45kts
Cleared for light icing, 1/2 inch accretion in 40 NM
Flight in icing conditions min ambient temp -5C
Min freezing level 500ft above surface (so that a descent into a positive air band is possible)
Max alt 5000ft PA
Min flight temp in engine icing -23C (below +6Cwith precipitation or horizontal viz less than 1000m)
Sloping ground - no specific limits, but care should be taken with the fwd/aft cyclic & low collective combinations to avoid clobbering the fuselage - not good for your health & future employment. Other limits of pitch, roll & heave apply from the IVLL which each N Sea operator will have.
Hope this helps
Almost forgot, one N Sea operator has specific limits for protracted running on the ground in rreduced visibility caused by falling snow.