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Can a Switchboard with 6 circuit disconnect, and Service entrance rating, have another additional disconnect for a TVSS unit?

Issue:
Can a Switchboard with 6 circuit disconnect, and Service entrance rating, have another additional disconnect for a TVSS unit?

Product Line:
QED/Speed D SWBD

Environment:
Application

Cause:
NEC Code clarification

Resolution:
The code changed a few years back and does now allow an extra SWBD disconnect for use of an extra device, not distribution. In a 6-disconnect Service entrance application, it is now acceptable to have this disconnect, even after you already have 6 mains - it does not count as one of 6 mains."