The NEC^® specifically requires Class 1, Class 2, and Class 3 circuits to be installed in a neat and workmanlike manner but there is no real requirement in Article 725 on securing and supporting the cables.

The OESC has amended the rules in 725.24 to include a reference back to Section 300.11 where cable supporting is addressed. See below:

725.24 Mechanical Execution of Work. Class 1, Class 2, and Class 3 circuits shall be installed in a neat and workmanlike manner. Cables and conductors installed exposed on the surface of ceilings and sidewalls shall be supported by the building structure in such a manner that the cable will not be damaged by normal building use. Such cables shall be supported by straps, staples, hangers, cable ties, or similar fittings designed and installed so as not to damage the cable. This installation shall also comply with 300.4(D) and 300.11.

Oregon amendments to the 2020 NEC^® are located in “Table 1-E” of the Oregon Electrical Specialty Code (OESC) which can be seen using the following link or the OESC PDF file located near the bottom of the screen: https://www.oregon.gov/bcd/codes-stand/Documents/21oesc-table1-e-2021April.pdf