Guidance for Returning Officers administering a Senedd election

If a candidate on a party list or any individual candidate dies but the poll remains contested, the election will continue as normal. You must take reasonable steps to publicise the name of the candidate, the fact of their death, whether they were an individual candidate or a party list candidate and, if they were standing on behalf of a registered party, the name of the party.1
 
You should publicise the death by placing notices outside and inside the polling stations in the constituency.

If you receive proof and are satisfied before the result is announced that a candidate on a party list or an individual candidate has died and as a result the poll has become uncontested, the election must be stopped.2 If this happens before polling begins, you must countermand the notice of poll.3 If the poll is underway or the counting is being undertaken, the poll or the count must be abandoned.4
     
Where an election becomes uncontested as the result of the death of an individual or party list candidate the remaining candidates must be declared to be elected.5
 
Proof of death is not defined. You should be satisfied with any information that you have received to indicate that the death has occurred.