Lounge access is only on routes where the qf/EK partnership applies... so you can't use the EK lounge in Australia before a QF flight to the USA for example. Their partnership doesn't extend to the usa... and I guess a code share is a good way of working that agreement out? Same with other flights around the world, just because EK has a lounge in a particular port it doesn't mean QF pax can automatically use it. .