Since these are captive bred (I'm assuming from legally held animals), I think the Federal Permit is only required if they are being obtained from outside of Massachussetts and transported across state lines for sale, trade or barter.
The Northern Population is considered Threatened in New York, Massachussetts and Connecticut by the USFWS and is listed as such on Appendix II. The Southern Population (which extends to extreme North Georgia) is not considered Threatened by the USFWS, but is afforded protected status under the Federal Endangered Species Act as a similar population to the one listed as Threatened. Since it is also listed as Endangered by the State of Massachussetts, a permit from that State will certainly be required to keep them or possess them in the state. It is also listed as Threatened by the State of Georgia, interestingly enough, and I would assume that it is similarly listed in every other state where it occurs.
The following link:
www.api4animals.org/doc.asp?ID=353
will explain the rules for issuance of Special Propagation Permits for Protected Species. In there, under the title : Categorical Non-exemptions, you will find reference to 321 CMR 10.60.
That statute can be found at this link:
www.state.ma.us/dfwele/dfw/nhesp/nhrare.htm
The way I read it is that they will not exempt Bog Turtles since they are found listed as Endangered by the State of Massachussetts on the list provided at 321 CMR 10.60. You may want to call the Massachussetts Fish and Game folks for clarification.