“The recent op-ed by Josh Cohen promotes ideas of settlement that not only ignore Ukraine’s sovereign choice but are hardly compliant with the fundamental principles of international law,” Tochytskyi wrote on Euroactiv.

Cohen’s call to the U.S. not to consider the possibility of supplying defensive weapons to Ukraine and take off the table the issue of possible future Ukraine’s NATO membership because it would inevitably lead to retaliation by Moscow in Donbas, Syria, North Korea, Afghanistan, Kaliningrad or elsewhere “could be seen as a usual short-sighted narrative of appeasing the aggressor”, according to the Ukrainian diplomat.

Tochytskyi recalls that the non-bloc status of Ukraine back in 2014 did not prevent Russia from launching an aggression against its neighbor country. Since then, more than 11,000 Ukrainians lost their lives, about 25,000 have been wounded, 7% of Ukrainian territory has been occupied, and 20% of its economic potential has been lost.

“But Ukraine withstood and defended itself,” the Ukrainian official stressed.

Read alsoWhat Russian "peacekeepers" want“With overwhelming support by Ukrainians for European and Euro-Atlantic integration, it would be wise not to speculate on the issue of possible future membership but leave it to the sovereign choice and decision of Ukraine and the member states,” wrote Tochytskyi, adding that “what struck me the most in the article was the cynical idea to elaborate a formula for shared sovereignty over Crimea or Russian payment to Ukraine for the occupied territory.”

He also condemned the idea to “ease sanctions against Russia while offering Ukraine assistance in rebuilding the Donbas region.”

“The territorial integrity of Ukraine is not a bargaining chip. Ukrainian society which went through the Revolution of Dignity and three years of fighting against external aggression simply will not accept any idea of so called ‘shared sovereignty’ over Crimea or financial compensation for the occupation,” he wrote.

The diplomat emphasizes that there is “no other option than to build the solution to the Crimean issue on the basis of the norms and principles of international law, respect for the sovereignty and territorial integrity of Ukraine.”

“The Russian aggression began with the brutal occupation of Crimea and this is where it should come to its end,” he wrote.

Read alsoPoroshenko: Peace in Donbas can be ensured by political and diplomatic means, but with strong armyThe only possible settlement agreeable to Ukraine is restoring the sovereignty and territorial integrity of Ukraine over Crimea which can be done by launching an international mechanism of de-occupation as initiated by the President of Ukraine, Petro Poroshenko, with the aim of Russia’s peaceful withdrawal from Crimea, according to Tochytskyi.

“To this end, we have to use all available instruments of international law, international courts and arbitrages, monitoring mechanisms, international organisations and fora,” he wrote. “The fact that Russia has been recognised as an occupying power by the majority of the UN member states, as well as the consistent implementation by the EU of its non-recognition policy gives us confidence in the overwhelming support by our international partners.”

Noting that the Crimean peninsula has become a grey zone for human rights and a territory of fear, the Ukrainian envoy to the EU says that the “repression of Crimean Tatars and Ukrainians who do not recognise the illegal annexation of Crimea continues.”

Read alsoUkraine authorities condemn verdict against Chyigoz in occupied CrimeaAmong the recent appalling examples is the sentencing of the Deputy Chairman of the Mejlis of the Crimean Tatar People, Ahtem Ciygoz, by the occupation authorities, to 8 years in jail for protesting against Russia’s takeover of Crimea.

“Obviously Russia is not going to leave Crimea on its own. We have to make it do so. We should step up international diplomatic and political pressure on the aggressor to restore Ukraine’s sovereignty over Crimea and to release dozens of Ukrainian political prisoners prosecuted by Russia,” Tochytskyi wrote. “Expanding sanctions towards the participants of faked elections in the occupied territory of Crimea and Sevastopol as well as to those responsible for grave human rights violations should be in our toolkit.”

Read alsoPoroshenko to raise issue on peacekeepers in Donbas at UN General AssemblyAdmitting that the it “could probably be a long way”, the diplomat remains positive that “only by bringing Russia back to the norms and principles of international law and by not giving up our common values we could safeguard peace, security and stability in the region.”

“What would be the alternative? A chaos and domination of force over the international law,” Tochytskyi concludes.