recceguy :
Never heard of that when I was doing intercepts on my own fighter.
Shows your age
In a fighter cockpit or an Air Defence OPS room, who cares about an OACI "recommendation" ?
Well ICAO is all about recommendations ( the "R" in SARPs) and yes, even in France ( the country where I assume you were "doing intercepts" ) the procedure is applied and they normally do take ICAO recommendations very seriously.
They also had they own incident, similar to peekay4 example, with a Dutch B737 over Cambrai lost between 2 frequencies a month after 9/11 where both a/c dived around 20.000 ft at 4000 ft/min in the end, as the squawking Mirage kept right on with it keeping the 737 RA alive. The 737 switching finally to 121,5 saved the day in the end.
But lessons were learnt, and measures designed to prevent recurrence. .