Original Inter-Agency Space Debris Coordination Committee (IADC) Guidelines, along with a more in-depth technical manual on implementation:
https://www.iadc-home.org/documents_public/view/id/82#u
And the version endorsed by the UN:
https://www.unoosa.org/pdf/publications/st_space_49E.pdf
New UN Long-Term Sustainability Guidelines (see Annex II):
https://www.unoosa.org/res/oosadoc/data/documents/2019/a/a7420_0_html/V1906077.pdf
https://www.esa.int/Safety_Security/Space_Debris/ESA_s_Space_Environment_Report_2021
In early 2021, IRGC began a new project to study the governance of risks related to space debris and assess policy options to ensure the safe and sustainable use of space, in collaboration with the EPFL Space Center (eSpace) and Space Innovation.
Collision risk from space debris: Current status, challenges and response strategies
In June 2021, IRGC published a first report detailing the current status of collision risk from space debris, challenges to addressing it and potential response strategies (download).
Policy options to address collision risk from space debris
In November 2021, IRGC published a policy brief presenting a range of policy options to improve the assessment, evaluation and management of collision risk (download). The following video summarises the problem and the policy options presented in the policy brief.
https://www.weforum.org/projects/space-sustainability-rating
The Space Sustainability Rating (SSR) provides a score representing a mission’s sustainability as it relates to debris mitigation and alignment with international guidelines.