ID and permit requirements vary depending on your destination and whether
an Inner Line Permit or other permit is required. For permit-related travel in
Sikkim, carry an accepted government-issued ID such as a Driving License,
Voter ID or Passport.

If you are unsure about the requirements for your destination, contact
Wizzride support before travelling.

For more info, click the link below.
https://wizzride.com/sikkim_permit_guide