New York City Health Department officials announced a major crackdown on non-meat-wiping food vendors Monday. 'Effective June 30, when a hot dog falls to the pavement, the vendor must pick it up and wipe it thoroughly with a rag before selling it,' Deputy Health Commissioner Louis Holman said. 'Further, the rag must be kept at least two feet off the ground and rinsed weekly.' The new ordinance is the strictest passed by the city's Health Department since a 1996 law requiring food-service workers to be fully clothed. 