sentences:  After 1 March 2010, biometric passport are valid for 10 years.The data on the chip Russian passports are protected by a technology access control BAC (basic access control), which allows producing read data only after entering the passport number, date of birth of the holder and the expiration date of the passport (usually by means of recognition of the machine readable zone of the passport), which excludes unauthorised access to data on the chip.The holders of Russian Federation passports issued in Crimea and Sevastopol after their 2014 annexation, territory that is internationally recognized as a foreign-occupied part of Ukraine, do not have their passports recognized by the United States, and are denied European Schengen-zone visas (although Crimean residents who hold Ukrainian biometric passports can visit the EU visa-free).