From Donbas militants' website

Citizens with "DPR"/"LPR" "passports" without a Russian residence permit could stay in Russia no longer than 90 days in a row, then they should leave the country for another 90 days, sources in Russia's Duma told RBC.

A representative of the Russian Interior Ministry's migration department, a member of the Russian Presidential Council for Civil Society and Human Rights and an official from the so-called "LPR" confirmed this information in a comment to the Russian news agency.

At the same time, the Russian authorities have decided not to apply the simplified procedure to "DPR"/"LPR" residents' stay in Russian territory.

In addition, the Russian authorities indeed treat "DPR"/"LPR" residents as Ukrainian citizens, head of the Civil Society and Human Rights Council's migration policy commission Evgeny Bobrov told RBC.

However, as "DPR" "army" member Aleksandr Zhuchkovsky told the Russian media outlet that in practice "DPR"/"LPR" residents do not have to fill in migration cards while crossing the Russian border.

Read alsoUkraine says Russia hasn't fulfilled single clause of Minsk accordsAs UNIAN reported earlier, Putin on February 18 legalized the use of "DPR/LPR"-issued passports and other identity documents, namely birth, marriage/divorce certificates, car registration plates, in Russia. Putin's decree stipulates that the "DPR/LPR" documents are recognized temporarily until the situation in Donbas has been settled.

Ukrainian President Petro Poroshenko said then that the recognition by Russia of fake identity documents issued by the so-called "DPR/LPR" required the strengthening of anti-Russian sanctions, as it proves the Russian occupation of Donbas and violates the Minsk peace agreements on Donbas.