My basic thesis on the UNSC Iran sanctions (which just passed) was that China agreed with the Obama administration to support UN sanctions on the understanding that harsher national sanctions which would disrupt China's ordinary dealings with Iran might be passed by Congress, but would not be implemented by the Obama administration (through the exercise of the President's power to grant waivers to "cooperating countries" i.e. nations like China that voted in favor of the UN sanctions).
It looks like the Russians, at least, have that understanding.
As soon as the UN sanctions passed, Novosti carried this news article:
Russia threatens payback if Iran sanctions affect its interests
MOSCOW, June 9 (RIA Novosti) - The Russian Foreign Ministry warned on Wednesday of retaliatory measures if new sanctions against Iran affected Russian companies or individuals.
The United Nations Security Council approved on Wednesday a new package of economic sanctions against Iran over its nuclear program.
"We cannot possibly ignore signals reaching us about the intention of some of our partners...to start considering additional, tougher restrictive measures against Iran than those provided for under the UN Security Council resolution," the ministry said in a statement.
"Such decisions, if they affect Russian legal entities or individuals, are fraught with retaliatory measures."
To make sure the message got across, Novosti also gave over some of its prime front page web space to an all caps slug of type declaring:
RUSSIAN FOREIGN MINISTRY WARNS OF RETALIATORY MEASURES IF IRAN SANCTIONS APPLIED AGAINST RUSSIAN COMPANIES, INDIVIDUALS