dear,
getting permission for CAB ride isn't an easy work.
The LP/ALP won't allow u for a cab ride at all.
they can only allow u to enter inside n have a small conversation.
For...
more... this, u need to contact the zonal Public Relations Dept (mostly) who can give u the permission with a letter.
but this process isn't an easy work too. Now a days, due to security issues, Cab rides are kinda prohibited unless one has a valid letter signed by the official.