The Partnership for Shared Book Collections has a Best Practices for MOUs, which includes recommended elements for MOUs and links to the MOUs of several Shared Print Programs.
Shared Print Programs will have policies that reflect their operations. These often include criteria for membership, scope of materials retained, disclosure and discovery requirements, storage requirements, revoking retentions, and lending policies/recommendations. Below are a few examples, links to programs policy pages, and links to several best practices.