Special operation license is valid for 6 years, every 3 years review, full 6 years need to re-examine the license. Special operators in the validity of special operations license, continuously engaged in this type of work for more than 10 years, strict compliance with relevant safety laws and regulations, the original assessment of the licensing authority or practitioners in the location of the assessment of the licensing authority agreed to, the special operations license review time can be extended to 1 every 6 years.