https://www.ndtvprofit.com/legal-library/national-parks-wildlife-sanctuaries-to-have-minimum-1km-esz-says-supreme-court-khaitan-co-analysis?utm_source=telegram&utm_medium=referral&utm_campaign=socialshare
Since there was no minimum distance prescribed earlier, States were proposing ESZs to a minimal extent, even lesser than one km.