Maximum allowable time after CO contact

Dear all, My CO has contacted me on 22 Feb' 17 and asked to provide PCC, medical, and additional documents for employment. Is there any deadline for submission?
usually it is 28 days.
Thank you. but can it be extended in case of any emergency?
Yes. 28 days from the day you got the mail.
Yes, you have 28 days to upload all the requested documents
Hello Faruqe Vai. I am also from Bangladesh. Can we talkover Phone?
adnan you can contact me at faruk079@gmail.com