Two key points from the decision:

The DSD covered by the Regulations are limited to athletes with “46 XY DSD” – i.e. conditions where the affected individual has XY chromosomes. Accordingly, individuals with XX chromosomes are not subject to any restrictions or eligibility conditions under the DSD Regulations.
The Panel found that the DSD Regulations are discriminatory but the majority of the Panel found that, on the basis of the evidence submitted by the parties, such discrimination is a necessary, reasonable and proportionate means of achieving the IAAF’s aim of preserving the integrity of female athletics in the Restricted Events.