Obligation to hold a visa with regard to exercising gainful occupation:
◾ in the primary or secondary construction industry and civil engineering, catering and hotel services, industrial and private cleaners, surveillance and security services, and erotic services;
◾ gainful occupation of any another kind, if such occupation exceeds 8 days within a calendar year.
Exemption to hold a visa with regard to exercising gainful occupation:
◾ Holders of a longterm residence permit issued by a Schengen member state or a valid type D visa, provided they also hold a recognized travel document.