In my case, they requested me to send the documents via email. So i thought i could use the same one. Also, what confused me is that if they were to request new PCC after MD, why do they suggest to send the PCC as part of the initial application submission? They could have not included it as one of the initial requirements and kept it as something to be provided along with medical.
in my case, i have submitted the same pcc and asked the case officer if they require a more recent one. i didn't hear from her yet.