UE2 - UT2kX PlayerController - how stopfiring is handled?

var bool bIsFiring;
var bool bIsAltFiring;

replication
{
    reliable if( Role==ROLE_Authority )
		bIsFiring, bIsAltFiring;
    reliable if( Role<ROLE_Authority )
		NotifyFire, NotifyAltFire, NotifyStopFire;
}

//this function is added GB function, that should be called on server when the player fires his weapon
function NotifyFire(optional float f)
{
	//log("NotifyFire");
}

//this function is added GB function, that should be called on server when the player fires his weapon
function NotifyAltFire(optional float f)
{
	//log("NotifyFire");
}

//this hook makes every default call of Fire function replicated on server
//used to export player fire calls
exec function Fire( optional float F )
{
	bIsFiring = true; //this boolean is used to get the stopFire call
	NotifyFire(F);
	super.Fire(F);
}

//this hook makes every default call of AltFire function replicated on server
//used to export player fire calls
exec function AltFire( optional float F )
{
	bIsAltFiring = true; //this boolean is used to get the stopFire call
	NotifyAltFire(F);
	super.AltFire(F);
}

//function that will be called when player stops firing
function NotifyStopFire(bool bAltFire)
{
	log("NotifyStopFire");
}

// a little hack so we get notified when the player stops shooting
event PlayerTick( float DeltaTime )
{
	super.PlayerTick(DeltaTime);

	if (bIsFiring && bFire == 0)
	{
		bIsFiring = false;
		NotifyStopFire(false);
    }
    if (bIsAltFiring && bAltFire == 0)
    {
		bIsAltFiring = false;
		NotifyStopFire(true);
    }
}