Ukraine allows citizens of specific countries to enter Ukraine without a visa.
Crimea is under de facto Russian control and the visa policy of Russia applies. Ukraine announced that foreigners should comply with Ukrainian visa regime including obtaining a Ukrainian visa if one is necessary and that otherwise it may entail sanctions for "support of the temporary occupation of the Ukrainian territory".
1 - up to 30 days within a 60 day period. 2 - up to 14 days. 3 - visa not required for service, tourist and private trips on conditions that documents certifying the purpose of the trip are provided 4 - up to 60 days.