Regarding the access cost file "Calculation of the Unit Cost for Transnational Access":

- What is the definition of "maintenance, utilities"? Do they differ from indirect costs?

- What is the "total estimated quantity of access provided to all normal users of the infrastructure within the project life-time" (E) and what is the difference with "quantity of access offered under the proposal" (H)?

- What is the fraction of the unit cost to be charged to the proposal (F)?

- There is no special definition for "maintenance" or "utilities", given great diversity of RIs and specific requirements for each. In general, this encompasses all material items necessary for the functioning of an infrastructure, cost of special power sources, conservation, calibration, chemicals, etc. But normally, for the researchers involved, this should be clear. They differ from indirect costs of an institution as they refer specifically to the experiment costs.

- "Total estimated quantity of access provided to all normal users of the infrastructure within the project life-time" is understood as for example 1000 experiment hours in 2 years, undertaken by 200 researchers coming from different countries and financed from all possible sources. Whereas "quantity of access offered under the proposal" means e.g. 400 experiment hours undertaken by 60 researchers financed from the I3 project budget in question.

- The fraction of the unit cost to be charged to the proposal means: It may happen that the unit cost equals e.g. 450 Euro but only 400 Euro are charged to the I3 project. In that case it is possible to take into account other funding sources like basic financing of the infrastructure by a national body.