Ours - BA (A320) has it in a different chapter 34-60-01
Amongst the many operations items associated is this one
Operation on B-RNAV en-route airways with an out of date FMGS Navigation Database is permitted providing the Maintenance Procedure has been complied with and the authority has been obtained from the Duty Navigation Officer. Note: All European upper airspace is B-RNAV . Contact Flight Technical Dispatch for suitable routing.
The maintenance action is for us engineers to contact Flight Technical or the Navigation Officer so they can ensure the crew are properly briefed and to clarify any impact on the operation.
No mention of FL245 but I guess (being a non pilot) that is the Upper Airspace altitude?