This was intended to cover unknown future situations (‘unknown unknowns’) but also to capture situations such as a need to make changes to legislation where there has been an adverse court decision.
Bwriedir i hyn gwmpasu sefyllfaoedd anhysbys yn y dyfodol ond hefyd sefyllfaoedd megis yr angen i wneud newidiadau i ddeddfwriaeth lle y cafwyd penderfyniad anffafriol gan lys.