Who is responsible for checking the legality of initiatives?

CONSTITUTIONOF UGANDA (1995)

http://www.opm.go.ug/assets/media/resources/6/Constitution.pdf

Article 11. Right of citizens to demand referenda

 (5) The Commission shall, on receiving apetition under this section, verify whether the petition has been dulysubmitted by a registered voter and supported by the required number ofregistered voters.

 (6) The Commission shall verify whether thesignatures are those of registered voters and that subsection (2) (b) has beencomplied with.