UBOS was established by Uganda Bureau of Statistics Act N0. 2 of June 11, 1998
This Act provides for the development and maintenance of a National Statistical System to ensure collection, analysis and publication of integrated, relevant, reliable and timely statistical information. It also establishes the Bureau as a coordinating, monitoring and supervisory body for the National Statistical System; and for other matters incidental to the foregoing.
The Statistics Act has recently been updated and can be accessed here