This contract defines 2 sets of requirements for 2 separate Departments: CAD Additional Support and Autodesk Licencing Services for the Department for Infrastructure. DfI. Northern Ireland which can be summarised below: CAD Additional Support and Autodesk Licencing Services for Central Procurement Directorate. CPD. and Properties Division. PD., which are business areas within the Department of Finance for Northern Ireland. DoF. The Initial Contract Period is 1 year. There is a potential for 3 further annual extensions.