SIMFEROPOL, March 13. /ITAR-TASS/. Authorities of the Autonomous Republic of Crimea may declare the leaders of the Maidan revolution in Kiev Vitali Klitschko, Arseniy Yatsenyuk and Oleh Tyagnybok personae non grata as carriers of far-right extremist nationalistic ideology, the speaker of the Crimean legislature, the Supreme Council, said Thursday.