THE HAGUE, Netherlands (AP) — Dutch senators have approved a new law that makes everybody a potential organ donor unless they decide to opt out of the system.

The new system narrowly passed a vote in the upper house of the Dutch parliament Tuesday. The lower house last year passed the legislation with a one-vote majority.

The new law's drafter, lawmaker Pia Dijkstra, says under the new system — which is similar to donation laws in Belgium and Spain — every person over 18 who is not yet registered as a donor will receive a letter asking if they want to donate their organs after death.

Those who do not respond will be considered organ donors, although they will be able to amend their status at any time.