This question depends on your point of view. According to the national regulations, the managers of enterprises dealing in dangerous chemicals must have the qualification certificate (they can get it after paying for training and taking the exam). This qualification certificate is like a guarantee. For example, in remote rural areas, many people can ride motorcycles or drive agricultural vehicles, and they are skilled, but they may not get a driver's license. In general, there is no problem. If there is an accident, the law will not consider how skilled you are in driving, how many years you have been driving or who is responsible, and driving without a license will be severely punished. The reason is the same. If there are no accidents in your business, nothing is needed. Once something goes wrong, the country will first look at the management and qualification of your enterprise. If you have a qualification certificate, then analyze the cause of the accident. Without this certificate, all the responsibilities are put on you!