Table 4.3 provides a few estimates of the scope of the problem, specifically in agriculture regions.7 Other countries, like Mexico, have experienced unauthorised use, eased in particular by the use of falsified well and concession registration, and which could represent up to 50% of total concession authorisations in the Valley of Mexico (OECD, 2013b). In Spain, efforts to complete an inventory and the registration of all wells in the 1990s at an estimated total cost of EUR 66 million led only to partial results in 2001 (Fornes et al., Some of the river basin management plans, like that of Guadalquivir, explicitly expressed the goal of combatting illegal abstraction, but have not been able thus far to address the problem completely, in part because of the complexities of enforcement and the low impact of fines and legal consequences (ECA, 2014, EEA, 2013). There is no single authority representing both Turkish and Greek Cypriot people on the Island. Turkey recognises the Turkish Republic of Northern Cyprus (TRNC).