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From the bill:
"For the purposes of this section, "long gun" means a firearm other than a pistol or revolver.
Except as provided in subdivision of this subsection, no person, firm or corporation may sell, deliver or otherwise transfer, at retail, any long gun to any person under eighteen years of age.
No person, firm or corporation may sell, deliver or otherwise transfer, at retail, any semi-automatic centerfire rifle that has or accepts a magazine with a capacity exceeding five rounds to any person under twenty-one years of age. "
To read the full law click here.