There are numerous permissions for the rota's, however, this will depend on what access you would like to give the employee, to find the rota permission, follow the below steps:
Click Admin then click Post Setup.
Find the post which requires permissions to be amended and the click into it.
Expand Security then click Permissions.
Click Edit and then type in Rota, this will bring up all permissions relating to rota access.
You will need to give them this permission, the icons relate to:
Bin = delete.
Eye = view.
Plus + = add.
Pencil = Edit.
Lightening = Do.