Article 14 BIS 5 of the National Water Law establishes that those who make an efficient and clean use of water will benefit from economic incentives. Article 28 IV establishes that water right holders will have the right to transmit the rights of the titles that they possess (as well as the duty to install water meters and pay water charges), thus paving the way to water markets. The federal level has traditionally been the main actor in financing water resources management and irrigation, but this role has been evolving: first, with the transfer of irrigation districts to water user associations in the 1990s, and second with the current transition towards river basin management.