The laws of armed conflict are pretty much set out in the Geneva Conventions. Among other things, they set out that places where wounded combatants are treated can be targeted in limited circumstances. But it cuts two ways. If civilians are being treated there, they are at risk. Among other things, Israel treats its wounded at civilian facilities, making them too legitimate targets during periods of armed conflict. The US on the other hand, uses military only hospitals where the only civilans allowed are military dependents and retired military. That limits civilian exposure. So what changes in the rules does Israel propose? Will 90% of the High Contracting Parties to the Geneva conventions agree? Changing the rules is periodically proposed, but not often done.
Russian PM Medvedev says the use of ground troops in Syria could result in world war (AP)
from the article: Solana to Haaretz: New rules of war needed for age of terror