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The protection of the dark and (radio) quiet sky is a key aspect of the European Space Agency Zero Debris Charter. The International Astronomical Union Centre for the Protection of the Dark and Quiet Sky from Satellite Constellation Interference (IAU CPS) is one of the partners working to develop and implement technical and policy recommendations. In this contribution, we summarize and discuss existing recommendations and guidelines that are aimed at enabling the coexistence of satellite constellations and ground based astronomy. Many individuals and groups, including astronomers and industry partners, are working on strategies for more effectively sharing access to space. As a result, the IAU CPS recommendations touch on a variety of subjects ranging from satellite constellation design, to operational modes, to establishing standards for information sharing. The IAU CPS uniquely enables development of publicly accessible tools and services alongside these recommendations, and we endeavor to engage all parties in an open and constructive manner.