Article 3

The personal name of a member of the Italian or Hungarian national minority shall be entered in the Italian or Hungarian script and form, except if the member of the minority determines differently.

Source: Report submitted by the Republic of Slovenia pursuant to Art. 25 Para. 1 of the Framework Convention for the Protection of National Minorities
http://www.humanrights.coe.int/minorities/Eng/FrameworkConvention/StateReports/2000/slovenia/slovenia.html#annex2