Non-binding coordination instruments are widespread in the regulation of network industries, and crucial to avoid the negative consequences of specialised regulatory arrangements.
Aubin, D., Verhoest, K., Mathieu, E., & Mathys, J. (2010). Non-binding coordination in regulation. Network Industries Quarterly, 12(2), 17-20. https://hdl.handle.net/2078.5/63058 (Original work published 2010)