Russian AIP:
AD1.1
c) pilots-in-command of foreign aircraft operating in Russia shall make a decision on the possibility of …landing at destination aerodrome on their own, assuming full responsibility for the outcome of landing.
Any pilot has the responsibility for the outcome of any landing, you dont need an AIP for that statement.
However, what is the sense of giving that information (assuming the statement of the YAK-40 crew is correct) to a the presidential aircraft of a foreign nation on a known official mission, if it is against the AIP?
Enlighten me.
franzl