A library must have an adequate number of properly trained professional workers. The number of workers in a library depends on the scope of the library collections, annual increase of material and number or needs of potential users.
The professional library workers conducting a public service must have a prescribed type and level of education and passed library exam. A person who is employed as a professional librarian and has no library exam, must pass the exam in two years at the latest.
General libraries employ professional, manipulative and administrative-technical workers. The main occupations of professional workers are librarian (at least university education required), senior librarian (at least high education required) and librarian (secondary education required). The general library employs professional workers approximately in the proportion of 70% of librarians and 30% of other professional workers. The general library has at least 0.32 professional worker per 1,000 citizens and at least one administrative-technical or manipulative worker per 10,000 citizens.
The number of employees in school libraries of elementary school, secondary school, music school, higher vocational college, educational institutions for children and youth with special needs and halls of residence for secondary school students is determined by the regulations in the field of education.
The university library shall have an adequate number of professional workers according to its purpose or the tasks it performs. The library must employ at least two workers with university education in the library or other relevant field according to the pedagogical, scientific-research and artistic activity it performs.
The special library shall have at least one permanently employed professional library worker per 5,000 units of material. The professional worker of the special library must have at least university education, usually in the respective field of the special library, or university library education.