One of the main activities of ERRU, as the responsible regulatory authority, is the licensing of physical and legal persons who exercise or will exercise their activity in the management of water supply systems and the removal of waste water processing, in accordance with the law no. 8102 dated 28.03.1996, amended.

According to VKM no. 958, dated 06.05.2009, currently there are four licensing categories for the following categories; Category A, for the collection and distribution of water for public consumption Category B, for processing water for public consumption Category C, for the removal of polluted water Category D, for wastewater treatment Information on the licensing process and application procedure can be found here.