VIEW_QUESTION_LIST and EDIT_SETTINGS (USE_API for services APIs only).
Only one instance of BulkTopicExporter can be in progress at a time. Any subsequent requests to start one will fail.
After the initial POST call to bulkExport.json, subsequent GET calls can be made to /services/v2/topic/bulkExport/status.json to get the status of the export operation which will return an OperationStatusData object.
Only one bulk operation can be in progress at a time. Any subsequent requests made while an operation is in progress will result in a 403 - Forbidden error.