The office has been created "on the territories controlled by Ukraine", says its top military chief.
Ukrainian Gen Oleksandr Syrsky said the office would "maintain law and order" and "meet the immediate needs" of the population in the area.
In a video posted on social media, Gen Syrsky is seen telling a meeting chaired by Ukrainian President Volodymyr Zelensky that the office has been created "on the territories controlled by Ukraine".
There is, however, still one big restriction. No Western country has given Kyiv the green light to use their long-range missiles to strike targets inside Russia.
Just let them strike in Russia already! FFS EU and USA, what are you waiting for?
The long range missiles put Moscow in range.
The fear is that bombing Moscow would put Putin in a "nothing-left-to-lose" situation which would make the use of nukes more likely.
With that logic, were Ukraine as successful as advancing close towards Moscow, the West would need to hinder the advance in order to calm the Kremlin down to prevent nuclear war.
So send a small platoon in, plant a flag saying “this is now Ukraine” and then send the long range missle to blow up that spot and say “we were just using them inside Ukraine”.