Originally Posted by
gdoubleu
Indeed, there is no provision in the Montreal convention for the carrier to enforce a restriction.
Article 27 — Freedom to Contract
You have broken the contract of carriage of the airline, which seems pretty clear-cut to me that they could deny liability.
What's interesting is that whilst most airlines will deny coverage for things like electronics in checked luggage, most don't spell it out as being an actual exclusion as per what's you've quoted.