Continuing education to extend the certificate of safety officer. Refers to the need to postpone the report 3 months before the expiration of the safety officer C certificate. After passing the continuing education examination (notice shall be given within one week if the make-up examination fails), the enterprise where it belongs shall carry the letter of introduction from the unit, the application form for extension of the third-class personnel (with official seal and one-inch photo) and the certificate of safety assessment of the third-class personnel to the designated place for extension, and carry the extension receipt. During the extension period, it should be noted that the above materials are well prepared; Deferred collection should be properly kept; Remember the notice of the start of the continuing education course and the notice of the C-certificate exam for safety officers, so as not to forget. Generally speaking, the use period of safety officer C certificate is three years. If you don't apply for extension in time, you need to take the safety officer qualification examination again next time. Therefore, when the certificate has not expired, you can go to the local housing construction department for annual inspection and continuing education. Upon completion, the certificate is valid for three years, otherwise it can only be reapplied to the local housing construction department.