No headers needed. My CSV file just included all the fields in the same order with the first column as the mac address, then the policy tag name, and so on.... it worked for me.

It's on the disabled sponsor groups:   Work Centers>Guest Access>Configure>Sponsor Groups   Then navigate on all the Default groups and delete the "San Jose"on the "Configure Guest Types at:"option: 1. 2. *Note - Create a new location first before d...

I think this is what you're looking for: https://cway.cisco.com/sncheck/