The presented study is an attempt to indicate the impact of the concept of multilevel-governance (multi-level governance), well-established in the provisions related to the planning and implementation of the EU policies, with a view to developing forms of cooperation between public administration and its environment. This can be observed in the field of regulations relating to preparation of a contract partnership and creation of strategies and programs connected with the implementation of cohesion and development policy, which was adopted within the European Union. They precisely determine transformation of the Polish law in this area in the direction of adapting it to the EU law, and thus, influence the intensity of forms of cooperation as well between administrative bodies as social and economic partners. This, in turn, results in the intensification of network type connections in the vertical and horizontal planes that reveal new organizational and legal forms in the preparation and implementation phases of development tasks at the national, regional and local levels.