Standardized : For a lockout or tagout device to be standardized they must all be similar in at least one of the following ways: color, shape, size. Additionally, in the case of tagout devices, print and format should also be similar
US Department of Labor, Electric Power eTool: Glossary of Terms, Occupational Safety & Health Administration OSHA, Washington, D.C., USA 2010. https://www.osha.gov/SLTC/etools/electric_power/gl ossary.html, (OSHA/ Electr Pwr - Amer) {618}