You can copy an existing 'Service Level Agreement' (SLA) from one client to another via the 'Client' screen.
From the Home dashboard and under the heading 'Set Up' select 'Clients'
Select from your choice of clients or add a new client.
From the Tabs at the top of the screen select 'Service Level Agreement'
Click 'Copy SLAs' at the bottom of the screen
Select from your choice of clients to copy, the SLA will automatically copy over to your client