Thank you for your reply. I have found the thread, if anyone comes looking for it, the link is pasted below.Not many Pakistanis are there in this thread you are well served to find the Pakistan connect thread they might have better knowledge on this topic.
https://www.canadavisa.com/canada-immigration-discussion-board/threads/police-clearance-certificate-for-pakistan.593608/page-12#post-10857558