When you see symbols like UL, CSA, TUV, etc. or read phrases like "Designed to Satisfy...", independent testing and certification bodies tend to come to mind. Of course, actual independent testing is by no means the wishful thinking of the instrument design engineer.
How can you prove that your watch meets CAT III or CAT II? Things are not so simple. It is very likely that the manufacturer himself believes that his watch meets CAT III or CAT II, but has not undergone any independent certification. The International Electrotechnical Commission (IECInternational Electrotechnical Commission only develops and recommends its standards, but is not responsible for enforcing this standard. Only when a product has been tested to fully meet the standards of an independent verification agency, can it be used such as UL, CSA, TUV, etc. The certification body's logo is marked on the instrument. For example, UL3111, which is based on IEC1010 standards. In the mixed instrument market, independent testing certification is not the best, but may be the most direct method of identification.