Requirement to issue reasoned decision in the last instance
Ukraine
Answer
Yes
Source
The Codeof Administrative Proceedings of Ukraine (as of 2013, in Ukrainian)
Source: http://zakon3.rada.gov.ua/laws/show/en/2747-15/page6
Article 159. 1. The judgment must be lawful and reasoned.
2. A decision taken by the court is lawfulif it is taken in accordance with the substantive law and procedural rules.