Any materials - electronic or paper that the researchers wish to remove from the data center must be inspected by Data Center staff for disclosure review. Data Center staff must have a full and complete understanding of the contents of the materials leaving the Center. Microdata files will not be approved for releases. Each user will only have access to the specific variables identified in their approved project. However, more commonly, as required by their approved research protocol, they will be given access to characteristics of those places.
All materials are subject to a disclosure limitation review.
Any output that can directly or inferentially identify respondents cannot be removed. Models using geographic area as a dependent variable cannot be removed. The identity of sampling units cannot be removed. Only tabular output or model parameter estimates can be removed - microdata files will remain at the Data Center. The essential limitation is one of space, which will be worked out on a case by case basis.