For the external maritime and land borders the calculation of the amount shall be based on the length of sections of the external border multiplied by a threat level (minimum, normal, medium, high) for each border section, as follows:
I gcás teorainneacha seachtracha muirí agus talún, bunófar ríomh an mhéid ar fhad na gcodanna de theorainn sheachtrach arna iolrú faoi leibhéal bagartha (íosta, gnáth-, meán-, ard) do gach cuid de theorainn, mar a leanas: