service, except to the Defence forces i.e. Army, Navy and Air Force, replacing the existing system of the Defined Benefit Pension System. On 23 August 2003, the Interim Pension Fund Regulatory & Development Authority (PFRDA) was established through a resolution by the Government of India to "promote old age income security by establishing, developing and regulating pension funds, to protect the interests of subscribers to schemes of pension funds and for matters connected therewith or incidental thereto." The Pension Fund Regulatory & Development Authority Act was passed on 19 September 2013 and notified on 1 February 2014, thus setting up PFRDA as the regulator for pension sector in India. However, there remains a considerable amount of confusion with other entities like the Employee Provident Fund, pension funds run by life insurers, and mutual fund companies being outside the purview of PFRDA. The contributory pension system was notified by the Government of India on 22 December 2003, now named the National Pension System (NPS) with effect from 1 January 2004. The NPS was subsequently extended to all citizens of the country with effect from 1 May 2009, including self-employed professionals and others in the unorganized sector on a voluntary basis. Architecture Unlike traditional financial products where all the functions (sales, operations, service, fund management, depository) are done by one company, NPS follows an unbundled architecture where each step of the value chain has been made disjointed from the other. This unbundling not only allows the customer to mix and match his providers of service through the value chain, picking the best-suited option, but it also curbs the incidence of misselling. NPS architecture consists of the NPS Trust, which is entrusted with safeguarding subscribers' interests, two privately owned Central Recordkeeping Agencies (CRAs), which maintain the data and records, Point of Presence (POP) as collection, distribution and servicing arms, pension fund managers (PFM) for managing the investments of subscribers, a custodian to take care of the assets purchased by the fund managers, and a trustee bank to manage the banking operations. At age 60 the customer can choose to purchase pension Annuity Service Providers (ASP). NPS investors can't opt for two pension fund managers, neither can switch to another pension fund before a year. In 2017, PFRDA increased the entry age in NPS to 70 years. The number of pension fund managers (PFM) has increased to seven in NPS: SBI Pension Funds is