The public-private partnership (PPP or 3P) is a commercial legal relationship defined by the Government of India in 2011. The Government of India recognizes several types of PPPs, including User-fee based BOT model, Performance-based management/maintenance contracts, and Modified design-build (turnkey) contracts. Today, there are hundreds of PPP projects in various stages of implementation throughout the country. The government of India is actively promoting PPPs in many sectors of the economy.