Teleporter with Access Notecard

I use a teleporting script, and I need to add a notecard to it so only the people in the notecard can use the teleporter. I was wondering if it is possible. I will put the script below.

//replace the three numbers in following line with the target coordinates
//teleport only works within the same sim (no crossing sim borders)
//max teleport distance around 300 meters
vector target=<119, 231, 44>;

vector offset;

default
{
	on_rez(integer params)
	{
		llResetScript();
		offset = (target- llGetPos()) * (ZERO_ROTATION / llGetRot());
		llSitTarget(offset, ZERO_ROTATION);
	}

	state_entry()
	{
		offset = (target- llGetPos()) * (ZERO_ROTATION / llGetRot());
		llSetSitText("Teleport");
		llSitTarget(offset, ZERO_ROTATION);	  
	}

	changed(integer change) 
	{ // something changed
		if (change & CHANGED_LINK) 
		{ // and it was a link change
			llSleep(0.5); // llUnSit works better with this delay
			if (llAvatarOnSitTarget() != NULL_KEY) { // somebody is sitting on me
				llUnSit(llAvatarOnSitTarget()); // unsit him
			}
		}
	}
	
	touch_start(integer i)
	{
		llSay(0, "Please right-click and select Teleport");
	}
}

This thread discusses restricting access with a list but all the same points will apply to doing it with a notecard:

/54/14/212241/1.html