Multiple Autoloaders and licencing

Hi

I'm currently using Backup Exec 2010 R3 SP3 with an 8 slot autoloader which has 1 tape device in it, if I were to add an additional 8 slot autoloader with 1 tape device in it would I need to purchase an LEO licence?

The licencing PDF states - per drive in library past the first drive in each library - but I not sure I follow.

Thanks in advance

Andy