TRAI has also cut-short the validity period of Unique Porting Code (UPC) to four days from the previous 15 day period. The limitation has been revised for all Licensed Service Areas (LSA), except for the ones of Jammu and Kashmir, Assam and North-East. The validity of UPC in these areas remains unchanged. “For the cases of corporate porting, the present limit of 50 numbers in single authorisation letter has been enhanced to 100 numbers per authorisation letter. Post implementation of this regulation (amendment), appropriate Quality of Service (QoS) parameters will be devised by the authority to monitor the role of MNPSPs (Mobile Number Portability Service Providers) and Access Providers in the new scenario," the circular said. The process for withdrawal of porting requests has also been made simpler and quicker through SMS.