It is the case, and always has been back to the creation of the Ghost product in the mid-90's, that to clone a machine using Ghost by whatever means you employ - boot disk, external USB, network, multicast, unicast, with the management console or by hand - that doing so requires a license be used which is then considered "attached" to the machine you clone. One license, one machine.
[ Genuinely large enterprises may have special volume licensing programmes with Symantec which don't require that licenses be pre-purchased, and instead do an annual "true-up", but that's an accounting detail - the licenses are nonetheless absolutely required for legal use of Ghost. ]
The attached licenses are (with the exception of special "one-time" licenses sold to computer manufacturers) perpetual and cover cloning a machine over and over again, but using Ghost without such a license purchased for a machine is not and never has been legal.