There is no such rule, to my knowledge. All you need to do is, obtain an NOC from your current sponsor for your visa transfer as a part of which you will have to (through their HR) apply for your CID clearance, and submit copies of your attested academic certificates, Police Clearance from the Embassy of your origin, which is prerequisite. Please note that CID clearance takes a while, I think around 1 month minimum.
There is no such rule, to my knowledge. All you need to do is, obtain an NOC from your current sponsor for your visa transfer as a part of which you will have to (through their HR) apply for your CID clearance, and submit copies of your attested academic certificates, Police Clearance from the Embassy of your origin, which is prerequisite. Please note that CID clearance takes a while, I think around 1 month minimum.