That means, Israel can continue its air strikes and ground offensive until all the underground tunnels and rocket launchers are destroyed.
The only siege on Gaza is the Israeli blockade of weapons being shipped to Gaza. Otherwise, everything they need, they get. And their high obesity rate is proof that they have all the food the need. And the massive underground tunnel system is proof that they have all the building materials they need. So, fire away, IDF, level the rest of Gaza.