Questão jurídica principal
Whether the Franco-Swiss convention exempted the appellant from Swiss exemption tax before the 8 March 2002 exemption decision.
Decisão extraída
No; the convention had to be implemented by the dual national, and the Swiss exemption only took effect once the competent military authority recognized the situation on 8 March 2002.
Fundamentação extraída
The convention requires the person concerned to obtain the standard certificate ('model C') and approach the competent authorities. The exemption decision is constitutive and operates ex nunc, not retroactively.