What is front-of-pack warning label that prompted SC ultimatum to Centre?

Supreme Court has given the Centre two weeks to act on front-of-pack warning labels for packaged foods. Front-of-pack warning labels are labels or seals displayed prominently on the front of packaged food products. Their purpose is to help consumers quickly and easily identify products containing excessive amounts of nutrients such as sugar, total fats, saturated fats, trans fats and sodium.