The International Shooting Sport Federation (ISSF) has agreed to NRAI's request for exchange of quota, paving the way for participation of Heena Sidhu in the women's Air Pistol event at the London Olympics.The National Rifle Association of India said this in a statement on Thursday. The Commonwealth Games champion Sidhu earned a quota place for the London Games after the NRAI decided to exchange a spot in the 50 metre Rifle 3 Position event, won by Imran Hasan Khan in the Asian Shooting Championship in January, with the women's Air Pistol event.Imran, despite having won a quota, was left out as India has already reserved a maximum two slots in the 50 metre Rifle 3 Position category – that of Gagan Narang and Sanjeev Rajput who are ranked higher than Imran and have also qualified for the Games. As per ISSF rule, a country is allowed to exchange one quota won by its shooters with another, subject to its availability.