PCC is valid for 6 months and medicals are valid for 1 year from date of issuance. What if your PCC or medicals expire before or in between the process, where will that leave you? Also your COPR is valid as long as your medical or passport is valid, whichever is near, for example, if your medical is expiring in 3 months and your passport after 5 years, your COPR will remain valid for 3 months. Wise to get your medical and PCC after receiving ITA.