Chand was cleared to compete by the court which gave the IAAF body until July 24, 2017, to present new scientific evidence.

Chand is hyperandrogenic, meaning she has naturally high levels of testosterone.

The 19 year old sprinter, who hails from Orissa, had been disallowed from competing since last May as she had found to be carrying more testosterone level in her blood than what’s allowed, as per global Association of Athletics Federation (IAAF).

The daughter of weavers from Odisha’s Jajpur district, she decided to challenge the worldwide Association of Athletics Federation’s (IAAF) policy on hyperandrogenism, a condition which produces high testosterone levels in female athletes.

The CAS also said the rule would be scrapped permanently if the IAAF failed to prove that enhanced testosterone levels led to improved performance in hyperandrogenic athletes.

“It is what God has given me and I know he is with me”, she says.

“I’m sorry to say I don’t know how long it would take for testosterone to rise after cessation of suppression therapy”, wrote Epstein in an email, “but that could be a really hard thing to figure out”.

The IAAF introduced the rules in 2011 after South Africa’s Caster Semenya had been sidelined for nearly a year after winning the world 800 metres title in 2009 as an 18-year-old. “I wish her well”, he said. Her body produced levels that surpassed the IAAF guidelines.

But in a ruling, the Court of Arbitration for Sport suspended the controversial regulation for two years, allowing her to compete again.

She later returned to competition, winning a silver medal at the London Olympics in 2012.

“The Indian government has helped me a lot in all this, and I hope they back me more and I’m able to practice in the US in the coming months, ” she added. “Should the IAAF not file any scientific evidence within two years, the hyperandrogenism regulations will be declared void”. Cry she did on Monday, but they were tears of joy following the CAS ruling on female hyperandrogenism.

She won the 100/200m double at Asian Junior Athletics Championships.

The sports and gender activist who pushed Chand to approach the CAS termed the decision as “historic”.

The IAAF said that the Hyperandrogenism Regulations were adopted following a lengthy and comprehensive consultation exercise by its Expert Working Group in conjunction with the worldwide Olympic Committee, involving world-leading experts across various fields, along with numerous other stakeholders. High testosterone alone is not sufficient for barring female athletes from women’s competitions, ruled the Switzerland-based court. “The regulations aim to preserve fair competition by requiring such athletes either to show that they are androgen-resistant, or else bring those levels down below 10″, it said.