It takes about 1 month to review the c2 exam of Taizhou safety officer. Safety officer c2 certificate expires, and it will be reviewed two months in advance. C2 safety officer certificate, the basic conditions for registration are as follows: age 18 but under 60 years old, healthy, with technical secondary school (including high school, technical secondary school and vocational high school) education or junior and above titles, established labor relations with enterprises, engaged in construction management for more than two years, and passed the annual safety production education and training of enterprises.