GTT Regulatory Recovery Surcharge

We've been a GTT customer for several years and on our latest bill we now have a "Regulatory Recovery Surcharge" of almost 10% tacked on. We only purchase IP Transit services from them, nothing else, and have never had any fees tacked on top of our contracted agreed upon amount. Has anyone else ran into this? If this is a legit "surcharge" any idea of why we were never charged for that before? I figured I'd reach out to the community on this prior to jumping to further conclusions.  -Brandon