Can the User Type (Staff) create projects and tasks?

Can the User Type (Staff) create projects and tasks?

Hello, general inquiry here. 

We just started using Zoho invoices and have a couple of questions on user types:

Can a Staff user create projects and tasks? With the default setup, only admin users are able to create projects and tasks. Is this right? 

So what is the difference between a staff user and a staff user with time tracking access? 

Law