Existing Permanent Account Number (PAN) card holders are not required to apply for a new one under the upgraded PAN 2.0 system that is primarily aimed at introducing a 'common identifier' for all business-related activities, the Income Tax Department said on Tuesday.The Cabinet Committee on Economic Affairs (CCEA), chaired by Prime Minister Narendra Modi, had approved the Rs 1,435-crore PAN 2.0 Project to streamline and modernise the process of issuing and managing PAN and TAN, making it more user-friendly and efficient.