C.R.S. § 24-72-304
Section 2 of chapter 90 (SB 16-110), Session Laws of Colorado 2016, provides that the notation requirement in subsection (4.5) applies to offenses committed on or after September 1, 2016. Section 2 further provides that criminal justice agencies and custodians of criminal justice records shall make reasonable efforts to comply with subsection (4.5) for offenses committed prior to September 1, 2016.