The ministers of Foreign Affairs of the 5 JIT countries signed a Memorandum of Understanding. The MoU describes the co-financing and political support for Dutch criminal prosecution of those guilty of downing flight MH17 in Donbas on July 17, 2014.
The signatories shall establish a financial supervision committee to oversee the distribution of financial contributions, consisting of five members
The Netherlands will cover costs on prosecutors, the judiciary and the protection of witnesses. This is to make sure the prosecution is independant.
Ukraine Interfax has some details here.
Both memorandums will be valid for five years after signing, and then will be automatically extended for another five years. If one of the signatory countries decides to withdraw from one of the memoranda, it must inform the other countries in writing.
The Dutch text of the MoU can be read here.
Press release by Ukraine government here.by