The person responsible for change control shall recognize the contents of changes implemented by the sub-suppliers. The person shall guide and control the sub-suppliers to prepare the same manual for change control as that for the supplier itself and to operate their manuals. Also the supplier has to submit any changes at sub-suppliers to MMTh. The supplier considers management time of in-house, and must instruct officially the period of submitting „Process Change Notice‟ to the sub-supplier