Here we go.
FIA Sporting Regulations
16) INCIDENTS
16.1 "Incident" means any occurrence or series of occurrences involving one or more drivers, or any action by any driver, which is reported to the stewards by the race director (or noted by the stewards and subsequently investigated ) which :
a) Necessitated the suspension of a race under Article 41.
b) Constituted a breach of these Sporting Regulations or the Code.
c) Caused a false start by one or more cars.
d) Caused a collision.
e) Forced a driver off the track.
f) Illegitimately prevented a legitimate overtaking manoeuvre by a driver.
g) Illegitimately impeded another driver during overtaking.
Unless it was completely clear that a driver was in breach of any of the above, any incidents involving more than one car will normally be investigated after the race.
I think that covers Rosberg's move.