Is that per person of household?
See post 114:
From above:
"527 CMR 13.04: Licenses, Registrations, Permits and Certificates
(1) Exemption: License, Registration, or Permit: In accordance with the provisions of M.G.L. c. 148 § 13, the Board hereby prescribes the following quantities of explosive materials that shall be exempt from License, Registration, and Permit and may be kept, or stored in a building or other structure:"
A - it's not a good question - the answer was a few posts above.
B - It's a building.
C - it's ONLY in MA - part of their whole "we'll make you a felon for your own good" movement. Fine, it's not a felony here, but you know what I'm talking about.