The EU-Israel Association treaty is expiring, it needs to be renewed to remain active.

Renewing requires an unanimous vote in the European Council, which the Dutch Minister says he will block until the review is complete. The review will be conducted by the Ministry of Foreign Affairs of the Netherlands, not by the EC.

However I should note that this government coalition is a very staunch defender of Israel, so this minister deviating from basically unconditional support to Israel might triggger a cabinet crisis, so at this point it's hard to tell whether this block will stay in place until the review is complete.