Md. Code, Tax-Gen. § 8-417

(a) A public service company may claim a credit against the public service company franchise tax in an amount equal to: (1) 0.002 cents for each kilowatt hour of electricity in excess of 500 million up to 1,500 million kilowatt hours during a calendar year delivered for final consumption to a single industrial customer for use in a production activity at the same location in the State; and (2) 0.0455 cents for each kilowatt hour of electricity in excess of 1,500 million kilowatt hours during a calendar year delivered for final consumption to a single industrial customer for use in a production activity at the same location in the State. (b) A public service company may claim a credit against the public service company franchise tax in an amount equal to the tax imposed for each therm of natural gas delivered for final consumption in the State to an industrial customer for use in a production activity in the State. (c) The Public Service Commission shall require that the credits allowed under this section are passed through to the customers to whom the electricity or natural gas on which the credits are based is delivered.