Liz Riley is a barrister in Bird & Bird's Sports Group and has advised sports governing bodies on this issue at both national and international level. She assisted the IOC with the production of its new transgender guidelines, and also represented the IAAF in relation to a recent challenge to its rules governing the eligibility of female athletes with hyperandrogenism to compete in women's competition (CAS 2014/A/3759, Chand v AFI & IAAF).