TEN-forordningen tillader ikke, at den samme fase af et enkelt projekt finansieres over både TEN’s budget og andre EF-budgetter, men i nogle tilfælde kan feasibilityundersøgelser, der er finansieret over TEN’s budget, efterfølges af støtte fra EFRU og EIB til (del-)finansiering især af anlægsfasen.
The TENs Regulation does not allow the same phase of a single project to be financed both by the TENs budget and from other Community sources but, in some cases, feasibility studies financed through the TENs budget may be followed by support from the ERDF and the EIB for the (part-) financing mainly of construction works for the actual investment.