The second vote is used to vote for a regional closed party list of candidates. Additional member's seats are allocated from the lists by the d'Hondt method, to create a more proportional outcome in both the region and the Senedd.
For the second vote, a regional closed party list is chosen to select candidates. Seats allocated from this list are then divided among parties using the d'Hondt method to achieve a more proportional representation within the region and the Senedd.