According to the relevant agreement, the validity period of the eight-yuan builder's certificate is three years, and the validity period of the certificate that has passed the annual examination is three years. However, the actual situation is that the construction administrative departments in most parts of the country only implement the system of continuing education for safety officers and annual examination of certificates, and there is no organization education and examination mechanism for other certificates.

Therefore, most of the certificates of building safety officers in China are valid for three years, and other certificates are not stipulated. They need to review, but they don't need exams. They need to go to the site for training. Expired certificates are invalid, and the annual review of enterprise qualifications is generally divided into two types, one is dynamic assessment of qualifications, and the other is validity review of qualifications. In this case, it takes 45 days to get the documents and then prepare the materials.