SAFA Ramp Inspections are part of a European Union safety program and shall be executed in a harmonized and standardized way in all EU Member States. Like, In Iceland, Norway, and Switzerland, and in all States with which EASA signed a working arrangement on SAFA.
For this reason the Annex to the Commission Directive 2008/49/EC calls for guidance material to give clear guidance and instructions to the inspectors performing SAFA ramp inspections. Inspectors must have received training in their relevant field of expertise before performing any SAFA ramp inspections. Details can be found in the EASA Guidance Material on the Qualification of Inspectors.
Here is excerpt of what is required for conformity for ICAO in addition to the SMS:
Pages 45-47 from SAFA Ramp Inspections Guidance Material – Version 2.0