Who is this for? Independent or well informed trekkers, group leaders and operators planning treks across Arunachal, Sikkim, West Bengal hills (Darjeeling–Singalila), Uttarakhand, Himachal Pradesh, Ladakh (UT) and Kashmir Valley. This hub explains the framework—ILP, PAP/RAP, Forest & National Park permits, and district/police checks—then links to a single, detailed guide