When the rateable values of properties are reassessed (see ‘Revaluation’), transitional arrangements may be put in place to moderate significant increases in bills.
Pan gaiff gwerthoedd ardrethol eiddo eu hailasesu (gweler ‘Ailbrisio’), efallai y rhoddir trefniadau trosiannol ar waith er mwyn sicrhau na fydd biliau yn cynyddu'n sylweddol.