:A                                                                                                                 Interface region                     Rigid               \-                   \-                                                                                                                          NIR_PBc far away (000-000)           Mobile              Embedded             0                                                                                                                          NIR_PBc near interface (00-00)       Partly mobile       Embedded             0  \*The abbreviations used are: *IR* - Interface regions, *NIR_PBc* -- Non-interacting regions with PB change