The Belgian Nuclear Research Center (SCK CEN) is organizing an international exercise with the aim of testing technologies and procedures under the International Partnership for Nuclear Disarmament Verification (IPNDV) objective, of identifying effective verification options. A first edition of this measurement campaign was performed at the end of 2019. The main goal was testing and comparing the performance of the different techniques (using gammas and neutron detectors), on its capability to verify the presence or absence of nuclear material, with characteristics equivalent to nuclear weapons material. The second edition of the exercise will introduce more realism to the measurements. The participants will have no information about the material to be assayed or its geometrical configuration, matching the foreseen situation in a disarmament verification. Twelve teams will take part in the exercise, which will be held during September 2023 at SCK CEN, Belgium. The AMC Working Group 4, named "Technical Nuclear Non-Proliferation and Safeguards", composes the team representing Sweden in the measurement campaign. The methodology to be used in the exercise, by the AMC team, is the detection of fast neutrons. The possibility of measuring fast neutrons may provide complementary capabilities for the weapon verification procedure, such as the distinction between spontaneous fission sources and (alpha,n) sources of neutrons. This paper presents more details on the IPNDV context and its connection to the particular exercise. It also presents the preparatory work involved for the measurement campaign, including the characterization of the detector to be used by the AMC group.