With regard to the grants, the existing operating complex is the subject of the Corporate Program for Obtaining and Maintaining the Grants of Right of Use of Water Resources, involving, in particular, the collection grants and the effluent discharge grants, and, as far as environmental licensing is concerned, the Corporate Programs for Obtaining and Maintaining Environmental Licensing of STPs, WTPs and Sewage Pumping Stations (SPSs), the licenses for which have to be renewed from time to time.