Cathar,
You may have missed HZ123's point.
As a JAR (or FAA operator)you are required to audit outside facilities from both technical and operational aspect. The point is not to convert the foreign Authority but to comply with your own rules.
If for example you decided to operate to Accra and they did not meet your requirements you would either have to get the foreign Authority to meet your requirements, OR get some exemption from your Authority, OR meet the requirements yourself. This is why you will see airlines providing their own security people at foreign airports for example in order to meet their requirements.
