If you want the copy in the same location or parrallel then you can use "Single Offset Entire Element" in the Horizontal Geometry task.
If you want the copy as a regular MicroStation element then, although this may not be suitable to you in terms of a workflow, you could create a new DGN, attach the DGN with the data to be copied as a reference and merge it into the master which will remove the rules. Then you can work with the graphics like any regular MicroStation element.
Regards
Paul