The EC 6th framework research project HyApproval will draft a Handbook which will describe allrelevant issues to get approval to construct and operate a Hydrogen Refuelling Station (HRS) forhydrogen vehicles. In WP3 of the HyApproval project it is under investigation which safetyinformation competent authorities require to give a licence to construct an operate an HRS. The paperdescribes the applied methodology to collect the information from the authorities in 5 EC countriesand the USA. The results of the interviews and recommendations for the information to include in theHandbook are presented.