Second, they will need to support locally customised options, for instance building on existing regulatory frameworks with engagement from stakeholders, and combining instruments that work better together. This does not mean, however, that groundwater systems there are equivalent to others. Some experts focus on whether solutions are technological or institutional (Giordano, 2009). Others compare direct versus indirect approaches (Kemper, 2007), consider the legal status of groundwater (Llamas et al.,