baghdad/erbil iraq iraq supreme federal court rule monday sept. 25 kurdish independence referendum unconstitutional result void strengthen baghdad hand stand-off kurdish region watch closely neighbor turkey iran kurdistan regional government directly say whether accept effective cancellation vote new prime minister call third party oversee talk iraq central government kurds krg also call international community include unite nations european union non-governmental organizations intervene help lift call restrictive sanction impose baghdad retaliation referendum kurds vote overwhelmingly break away iraq referendum defy central government baghdad alarm neighbor turkey iran kurdish minorities federal court issue decision consider kurdish region referendum unconstitutional rule final court spokesman say power rule cancel result referendum court responsible settle dispute iraq central government regions include kurdistan verdict subject appeal statement iraq prime minister haider al-abadi say call upon everybody ... avoid take step violate constitution law court rule nov. region province secede kurdistan regional government krg say last week would respect verdict signal new phase efforts restart negotiations region future iraqi government respond kurdish independence referendum seize kurdish-held city kirkuk territory dispute kurds central government also ban direct flight kurdistan demand control border cross long-serving kurdish president masoud barzani step affair regional government lead nephew prime minister nechirvan barzani try negotiate end confrontation news conference follow monday rule nechirvan barzani say court rule reach unilaterally without input krg representatives call third party oversee negotiations baghdad kurds right kurds enshrine iraqi constitution seek implementation constitution resolve issue baghdad barzani tell reporters accord kurdish rudaw tv constitution one package must apply entirety selectively however barzani directly say whether kurdish officials accept effective cancellation referendum krg previously offer freeze result krg late say chief concern lift embargo international flight region say hamper foreign investment well humanitarian efforts 1.5 million internally displace people currently region call international community intercede urge baghdad authorities lift embargo without condition international flight restrictive policies adopt baghdad erbil violation iraq obligations responsibilities international humanitarian law krg say statement iraqi court rule kurdish independence vote unconstitutional