This Deliverable elaborates an evaluation design for MSP that responds to a growing call for a more nuanced and critical conceptualisation and implementation of MSP as complex sites of governance. Here we posit that such an evaluation design should be based on 'sustainability of governance' in MSP. Furthermore, that such an evaluation approach should be built on good governance principles of participation, coordination, openness and collaboration in governance processes with the aim to strengthen MSP on both democratic and functionality grounds. To advance this position, we elaborate the relationship between integration as a concept that can be used to examine the sustainability of governance in practice. The conceptual framework is then used to structure a discussion of illustrative examples of the relationship between integration and sustainability of governance across several Baltic Sea case-studies. The results of these case studies are then framed in a discussion on aspects that need to be considered when designing an evaluation process for MSP. Points highlighted here are the need to adopt a deliberative and reflexive approach that draws on a wide body of evidence in evaluation. A set of clustered evaluative criteria (CEC), referring to practices deemed to be desirable for sustainability of MSP governance, are proposed to guide or direct an evaluation process. The CEC were derived through an assessment of what is deemed important in the relevant literature as well as through consideration of the experience of the Baltic cases. The CEC could be seen as indicators of integration that relate to aspects of sustainability of governance in MSP, as well as, in more instrumental terms to support problem-solving aimed at improving MSP coherence. The evaluation design outlined here would require to be tested and trialled in MSP settings to assess its saliency and refine its usability in practice.