We will move this sentence "Once an artifact achieves  Normative status, specific rules come into play around inter-version compatibility. These rules have implication for both forward and backward compatibility and are intended to allow implementations to exercise FHIR interfaces and process the content of FHIR resources safely while exchanging data between systems using different versions of FHIR." to before this "The following kinds of changes may be made to the specification:" We will append "These rules do not apply to non-normative content, including STU content within normative artifacts. We will change "The following kinds of changes may be made to the specification:" to "The following kinds of changes may be made to normative portions of the specification:" We will change "are changes that mean that previously conformant applications are no longer conformant to the updated specification" to "are changes that mean that previously conformant resource instances are no longer conformant to the updated specification" We will change " Non-substantive changes should not cause changes in any conformant application" to " Non-substantive changes should not cause changes in any conformant resource instances" We will change "In addition, this covers corrections that are judged not to create any expectation of change to a conformant application" to "In addition, this covers corrections that are judged not to create any expectation of change to a conformant resource instance."