How to become a library user?

Library user’s can register at the Central University Library.
Library registration of students and outside users is made throughout the whole year. To register and obtain a reader’s card, students need a student record book, colored photo, and they have to pay the corresponding annual fee. 
The e-cards of Sofia University “St. Kliment Ohridski” are valid for the University Library. More information you can find on the following link:
The reader’s card is valid for one calendar year. It allows patrons to use library materials and different information services offered in the reading rooms of the Central University Library and its 28 branch libraries.
Sofia University students may borrow library items for home use from the branch libraries only. Outside users can not borrow books for home use.
The fee for issuing a reader’s card is, as follows:
Students and faculty members of Sofia University - 5 BGN
Outside users - 15 BGN
Daily pass - 3 BGN
More information you can find in Library rules of service:

Университетска библиотека "Св. Климент Охридски" 2014