To Collect, Organize, Preserve and Disseminate Uganda's Documented Heritage and to oversee Local Governments and Communities in the establishment and management of Public and Community Libraries.
The National Library Act 2003 states that “Every publisher of a book or document in Uganda, at his/her cost to deposit three copies of the book or document or one copy of the video gram or film and ten copies in the case of any government departments with the National Library." This is what is referred to as legal deposit.
One of the functions of National Library of Uganda, is to promote the habit and culture of reading among Ugandans through reading campaigns and book exhibitions. In light of this, the National Library of Uganda endeavors to instill and promote a culture of reading among Ugandans, through organizing children reading tents very year, where children come and engage in various activities like reading (physical books and e-readers), drawing, spelling, story writing competitions, and book-making activities.
The National Library of Uganda Act, 2003 gives the National Library of Uganda the mandate to allocate International Standard Book Numbers and International Standard Serial Numbers to Authors and Publishers. It is always the Publisher or Author of a book who should apply for the ISBN. The Publisher in this case being a group, organization, company, or individual responsible for initiating the production of a publication.