Terms used in §§ 10-45-99 to 10-45-107, inclusive, mean:
(1) "Department," the Department of Revenue;
(2) "Business," a business that has purchased and is installing tangible personal property in the form of equipment or machinery for direct use in a manufacturing, fabricating, or processing business, which is subject to sales or use tax pursuant to chapter 10-45 or 10-46;
(3) "Project," the purchase and installation of equipment or machinery;
(4) "Project cost," the amount paid in money for a project;
(5) "Secretary," the secretary of the Department of Revenue.