The subsidiarity principle in water management suggests that water resources management and water supply service delivery should take place at the lowest appropriate governance level (Stoa, 2014). Subsidiarity, however, still aims to guarantee a degree of coordination between a lower authority in relation to a higher body. It therefore involves the sharing of powers between several levels of authority, (e.g., village, municipal, district/region, provincial/state, and central government) (European Parliament, 2021). The extent to which the subsidiarity principle is put into practice depends on whether the country has a centralised or decentralised form of government and the level and form of decentralisation it has implemented.
Decentralisation involves a transfer of responsibilities from central government to its subordinate local authorities, civil society or private sector (OECD, 2019). Among the types of decentralisation could be political, administrative, fiscal and market decentralisation. Political decentralisation means giving lower-level authorities the policy and decision-making powers. Administrative (or functional) decentralisation redistributes operational authority across different government levels (processing and filing applications, permits, etc.). Fiscal decentralisation gives to lower level of authorities tax collection powers, meaning that they can have their own revenue stream outside central government transfers. Finally, there is also market decentralisation which refers to the economic liberalization of certain economic activities including the private sector taking up more space in areas that have been previously dominated by government bodies (World Bank, 2013). Decentralisation reforms may have various underlying factors, however, it could often be seen as a counter-reaction to previous strong centralisation and even authoritarianism (Hooghe et al., 2016). Indeed, decentralisation is often back by a narrative on empowering citizens and bringing the state closer to people by entrusting locally elected representatives.