http://www.mass.gov/dfwele/dfw/regulations/cmr/cmr_400.htm
(4) Prohibitions: Except as otherwise provided for in M.G.L. c. 131 and 321 CMR, it shall be unlawful:
g) to set or use more than two hooks for fishing, or, in the case of ice fishing, five hooks
Although this one spells it out a little better...
http://www.eregulations.com/massachusetts/huntingandfishing/general-fishing-regulations-advisories/
FISHING PROHIBITIONS
•More than two hooks for fishing or more than five hooks when ice fishing. A hook is defined as an angling device attached to a fishing line which is designed to take one fish at a time but is not limited to devices commonly called spinners, spoons, bait harnesses, lead head jigs, or plugs.