Hi Ken
Such requirement exists also in France. However if you never reinject any current into consumers connected to the city power, not any declaration is tolerated.
That is the reason why I splitted my electric distribution in two: users of big current (forte puissance) and users of small current.
The low power consumers are supplied either by the inverter or by the city power thanks to an ATS (automatic transfert switch).
Attached is my single line diagram that I did prepare, but never submit (sorry, but in french!);
Regards
Philippe