Prime ministers Janez Jansa of Slovenia and Mateusz Morawiecki of Poland wrote to European Council President Charles Michel on Wednesday calling for Ukraine to be immediately granted EU membership candidate status.

“We need to draw up an ambitious and tangible plan for Ukraine’s rapid integration into the EU by 2030. The plan must be precise, with clearly defined steps, time lines, and a guarantee of membership by 2030 provided that the necessary conditions are met,” the two prime ministers said in a joint letter.

The first phase of the plan would be “the decision to immediately recognize European membership perspective for Ukraine and grant it EU candidate status after the submission of its EU membership application.”

“The same plan needs to be drawn up for Georgia, Moldova and all of our Western Balkan partners, that already have a clear European perspective,” they added.

Jansa and Morawiecki say that Russia violated all its commitments under the 1994 Budapest Memorandum, under which Ukraine agreed to nuclear disarmament in exchange for security within its internationally recognized borders, annexed the Crimea in 2014 and has now recognized the independence of two breakaway territories in eastern Ukraine.

“All the above-mentioned actions, activities and decisions of the Kremlin pose a direct and immediate threat not only to Ukraine but also to peace and stability in Europe. This threat must be met with a strong and united response, including the introduction of immediate sanctions,” the letter says.

The two prime ministers stressed that Ukraine’s EU membership would not be directed against Russia and its interests.

“It is time for quick and courageous decisions. The struggle for Europe is ongoing. The historical lesson of the last two decades to be learned is that if the EU is not enlarging, somebody else is. Now we are paying a price for ignoring this. Let us learn from it, as the cost of ignorance will only increase in the future,” Jansa and Morawiecki said.