Any DOE‑sponsored software package distributed by ESTSC  requires a license agreement . This agreement establishes conditions and requirements for requesters’ use of the software package after purchase. Requesters need to return the properly completed and signed agreement to ESTSC before the order will be processed. DOE encourages SIACs to follow this Departmental policy. For originating sites that choose to disseminate software, other licenses or use acknowledgements may be required.