For the avoidance of doubt regarding the ruling of the IOC, here is part of the ruling:
"Those who transition from female to male are eligible to compete in the
male category without restriction.
Those who transition from male to female are eligible to compete in the
female category under the following conditions:
2.1. The athlete has declared that her gender identity is female. The
declaration cannot be changed, for sporting purposes, for a minimum
of four years.
2.2. The athlete must demonstrate that her total testosterone level in serum
has been below 10 nmol/L for at least 12 months prior to her first
competition (with the requirement for any longer period to be based on
a confidential case-by-case evaluation, considering whether or not 12
months is a sufficient length of time to minimize any advantage in
women’s competition).
2.3. The athlete’s total testosterone level in serum must remain below 10
nmol/L throughout the period of desired eligibility to compete in the
female category.
2.4. Compliance with these conditions may be monitored by testing. In the
event of non-compliance, the athlete’s eligibility for female competition
will be suspended for 12 months.
- Hyperandrogenism in female athletes
In response to the interim award dated 24 July 2015 in Chand v AFI and IAAF
CAS 2014/A/3759, the IOC Consensus Meeting recommended:
Rules should be in place for the protection of women in sport and the
promotion of the principles of fair competition.
The IAAF, with support from other International Federations, National
Olympic Committees and other sports organisations, is encouraged to
revert to CAS with arguments and evidence to support the reinstatement of
its hyperandrogenism rules.
To avoid discrimination, if not eligible for female competition the athlete
should be eligible to compete in male competition."