At the national level, the National Water Agency (Agencia Nacional de Aguas, ANA) implements the National Water Resources Management System (Sistema Nacional de Gerenciamento de Recursos Hidricos, SINGREH) and regulates water uses in federal water bodies. State water agencies define rules and issue entitlements for state water bodies. At both levels, water resources councils define general rules and deliberate on water conflicts. River basin committees define priority water uses and approve river basin plans.