The Nuffield Council of Bioethics release last July a key document on Bioethics of Genetics. Now that a chinese "scientist" claims to have edited the genomes of twin baby girls is the right moment to read it. And the key principles are:
Principle 1: The welfare of the future person
Gametes or embryos that have been subject to genome editing procedures (or that are derived from cells that have been subject to such procedures) should be used only where the procedure is carried out in a manner and for a purpose that is intended to secure the welfare of and is consistent with the welfare of a person who may be born as a consequence of treatment using those cells.
Principle 2: Social justice and solidarity
The use of gametes or embryos that have been subject to genome editing procedures (or that are derived from cells that have been subject to such procedures) should be permitted only in circumstances in which it cannot reasonably be expected to produce or exacerbate social division or the unmitigated marginalisation or disadvantage of groups within society.New concerns are arising from CRISPR application and international regulations would be necessary to cope with them. The Association for responsible research and innovation in genome editing is precisely requesting this effort. The only precedents are the Declaration of Human Rights and it seems that it will not be an easy task to fulfill.
PS. Check the former post on Nuffield reports on this topic