C.R.S. § 39-21-108
(1) Amendments to subsection (1)(a) by House Bill 77-1076 and Senate Bill 77-144 were harmonized.
(2) Amendments to subsection (3) by Senate Bill 83-107 and Senate Bill 83-296 harmonized with House Bill 83-1445.
(3) Amendments to subsection (3) by Senate Bill 84-171 and Senate Bill 84-32 were harmonized.
(4) Amendments to subsection (3)(a)(I) and (3)(b) by Senate Bill 85-170 and House Bill 85-1380 were harmonized.
(5) Amendments to subsection (3)(a)(I) by House Bill 89-1180 and Senate Bill 89-153 were harmonized.
(6) Amendments to subsection (1)(a) by Senate Bill 01-125 and House Bill 01-1304 were harmonized.
(7) Amendments to subsection (3)(a)(I)(A) by House Bill 04-1350 and Senate Bill 04-253 were harmonized.
(8) The effective date for amendments to subsection (3)(a)(I)(A) by House Bill 12-1120 (chapter 27, Session Laws of Colorado 2012) was changed from August 8, 2012, to June 1, 2012, by House Bill 12S-1002 (First Extraordinary Session, chapter 2, p. 2432, Session Laws of Colorado 2012.)
(9) Section 9 of chapter 10 (SB 14-019), Session Laws of Colorado 2014, provides that changes to this section by the act apply to income tax years commencing on or after January 1, 2013, and any other income tax years that are open under § 39-21-107 or 39-21-108.
(10) Amendments to subsection (3)(a)(I)(A) by HB 24-1349 and SB 24-228 were harmonized, effective on the date of the official declaration of the vote thereon by the governor only if, at the November 2024 statewide election, a majority of voters approve the ballot issue referred in accordance with § 39-37-201.
(11) Section 19(1) of chapter 423 (HB 24-1349), Session Laws of Colorado 2024, provides that the act changing this section takes effect on the date of the official declaration of the vote thereon by the governor only if, at the November 2024 statewide election, a majority of voters approve the ballot issue referred in accordance with § 39-37-201.
For the legislative declaration contained in the 2001 act amending subsection (1)(a), see section 1 of chapter 95, Session Laws of Colorado 2001.