Hosting webinars

I work for a charity organisation which hosts monthly webinars. Our attendee audience is usually around the 300 mark. Recently, our admin people changed our Zoom license (I'm not quite sure why). The current state of our organisation's Zoom licenses is as follows:

Zoom Workplace Pro                              1 available, 9 used

Zoom Webinars - 500 attendees       0 available, 1 used

There are 3 of us who host webinars in rotation. Am I correct in assuming.....

1. The person to whom the '500 attendees' license is assigned will definitely be able to continue to host webinars?

2. The other two of us will need to purchase additional '500 attendees' licenses?  ie. the license is for an individual not for the whole organisation?

Many thanks,

Simon