Article 72

Light and radio pollution

1. Union spacecraft operators shall establish a plan containing measures that are adequate to limit light and radio pollution in accordance with paragraph 2.

2. The visual magnitude for spacecraft during the entire lifetime, including the design requirements on low reflectivity coating or shielding, shall be at least 7 magnitude. The plan referred to in paragraph 1 shall include all of the following elements:

(a) a description of the technical and operational measures implemented by the Union spacecraft operator to reduce the visible brightness of the spacecraft and to minimise the impact of satellites on astronomical observations;

(b) a description of the technical and operational measures implemented by the Union spacecraft operator to limit disruptions for radio astronomy observatories and to minimise the impact of satellites on astronomical observations.

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