39-22-303.5–2 Other Definitions.
The provisions of this rule apply to income tax years commencing on or after January 1, 2009, but prior to January 1, 2019. In addition to the definitions provided in § 39-22-303.5, C.R.S., the following terms are defined or further defined as follows: (1) “Apportionment” refers to the division of business income among states by use of a formula containing apportionment factors. (2) “Allocation” refers to the assignment of nonbusiness income to one or more particular states. (3) “Business activity” refers to the transactions and activity occurring in the regular course of a particular trade or business of a taxpayer. (4) “Sales” – See 1 CCR 201-2, Rule 39-22-303.5–4.