19. The use and strengthening of developing countries' systems remains central to our efforts to build effective institutions. We will build on our respective commitments set out in the Paris Declaration and Accra Agenda for Action to:
a) Use country systems as the default approach for development co-operation in support of activities managed by the public sector, working with and respecting the governance structures of both the provider of development co-‐operation and the developing country.
b) Assess jointly country systems using mutually agreed diagnostic tools. Based on the results of these assessments, providers of development co-‐operation will decide on the extent to which they can use country systems. Where the full use of country systems is not possible, the provider of development co-operation will state the reasons for non-use, and will discuss with government what would be required to move towards full use, including any necessary assistance or changes for the strengthening of systems. The use and strengthening of country systems should be placed within the overall context of national capacity development for sustainable outcomes.
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