The secretary of the Department of Revenue may promulgate rules, pursuant to chapter 1-26, concerning this exemption to:
(1) Specify the real and personal property that makes up an environmental upgrade;
(2) Determine the original and depreciated cost of the environmental upgrade;
(3) Establish a procedure to calculate the effect of the exemption upon the assessed value of the coal-fired power plant; and
(4) Allocate the exemption between the ownership of the coal-fired power plant.