Code, the Internal Revenue Code of the United States, as defined in M.G.L. c. 62, § 1.
Commissioner, the Commissioner of the Massachusetts Department of Revenue, or the Commissioner's duly authorized representative.
Taxpayers, individuals taxable under M.G.L. c. 62 and entitled to take deductions under M.G.L. c. 62, § 3(B).
830 CMR, § 62.3.2