Sterling
I checked the website for CGI NY and it mentions that
"You are required to submit the OCI application (Part-A and Part-B) in duplicate. For each of the two applications, an original 35mm X 35mm size color photo ( light colour background , not white background ) without border with front view of person's head and shoulders showing the full face in the middle of the photograph . "
It does not ask for any additional pictures, however, CGI - Chicago ask for 5 pics as you stated and I think San Fransisco asked for total 3, Washington DC also do not ask for any additional pictures. I even printed part A of the application and it does not say anything besides pasting pictures on each part A application. Where did you get information regarding 5 pictures for Washington DC embassy?