One Nation One Ration Card" system will include about 800 million people under the world’s biggest food-security program. Prime Minister Narendra Modi’s administration is betting that nationwide portability of rations can help bring migrants back to cities after the world’s largest lockdown -- imposed in March with just a few hours’ notice -- left many without food or money.Under the program, people are now allowed to take their quota of foodgrains from a “fair-price shop" anywhere in India by giving their ration card number and providing biometric authentication.