While the government-run Special Protection Group (SPG) is the primary agency in charge of the security, it is aided by the Central Reserve Police Force (CRPF), Border Security Force (BSF) and the Delhi Police to provide three-rung security for the estate. There is only one entrance to 7 Lok Kalyan Marg, which is guarded by the SPG. Only those visitors whose names have been given to SPG by the prime minister's personal secretaries are allowed in. The rule applies to everybody, including the national security adviser, top bureaucrats, relatives and guests (barring close family) and visitors are expected to carry an identity card. No outside vehicle is allowed to go beyond the checkpoint and even high-profile visitors including cabinet ministers are required to park their official vehicles by the checkpoint. Special SPG vehicles are used to carry the guests from the checkpoint to the residential office of the Prime Minister. The only exception to this rule is for the SPG protectors themselves who are allowed to take the vehicle carrying them into the complex.