In principle, the project manager certificate requires a four-year renewal. You should say "postponed" means updated. The project manager certificate needs continuing education to keep its validity. Generally, I need to do it every year. If it is troublesome, I can do it together in the third year (the schedule of my continuing education work is guided by the staff of IT Construction Talent Network, and I started doing it in the third year). After the completion, when the continuing education is proved qualified, I can do the renewal work.