For indicator RCO96, interregional cooperation refers also to regions within an MS, both between two regional programmes, or in the same national programme. For the national programmes, however, the following rule for double counting applies: “Interregional investments between two NUTS2 regions supported from the same operational programme should be considered only once.” For regions covered by several programmes, the rule for double counting states the following: “When interregional investments are covered by more than one operational programme, a given operational programme should report only the amount invested in partner regions (i.e. outside the programme area).”