What are the rules for using Segways?

I have been seeing Segway tours being conducted on the sand on Seven Mile Beach, on the sand typically between, I think Royal Palms up to around Beach Suites. Groups of 10 people or so a couple of times a day on the sand leaving tracks along the beach and wiggling around sunbathers. Is this legal? I didn’t realise motorised vehicles were allowed on public beaches.

Read Auntie’s answer and comment on CNS Local Life