Mass. Gen. Laws ch. 176B, § 7C: Retroactive premium rate increase

Section 7C. For purposes of this section, retroactive premium rate increase shall mean any premium rate increase based upon an actual approved rate which is assessed to a subscriber after any payment has been made by said subscriber based upon an estimated premium rate for such period of coverage.

A medical service corporation governed by this chapter which offers medicare supplemental individual or group coverage shall, in the event of a retroactive premium rate increase for such coverage, allocate such increase among the remaining outstanding premium payments due; provided, however, that no finance charge or additional cost may be charged as a result of such allocation.