Information for a data object can be prevented from loss for import and export operations across a trust boundary, such as may exist between environments under control of different legal entities. A set of dependencies, including information such as data tags and identifiers for applicable policies, can be embedded in a data object, such as directly in a header or in a digest or token of the data object. When the data object is transmitted across a trust boundary, such as to a destination bucket, the destination bucket can ensure that all dependencies are available and able to be enforced in the destination environment. If not, the request can be denied or the destination environment can contact the source environment to attempt to obtain and enforce the missing dependencies. At least some of the dependencies may also need to be transformed in the second environment.