LONDON (AP) – American sprinter LaTasha Jenkins can compete again after the World Anti-Doping Agency dropped its appeal of a U.S. arbitration ruling that cleared her of a positive drug test.

The decision makes it official that Jenkins is the first athlete to beat the U.S. Anti-Doping Agency on a drug charge. The two-time world medalist tested positive for the steroid nandrolone at a meet in Brussels, Belgium, in July 2006.

A three-person U.S. arbitration panel had ruled against USADA in December. It said results of her test were compromised because both European labs testing her sample violated international standards that require the tests be run by two different technicians.

At the time of the ruling, USADA had been 36-0 against American athletes in front of arbitration panels.

WADA appealed that decision in February to the Court of Arbitration for Sport in Lausanne, Switzerland, but decided to drop the case last week.

“Upon an extensive review of the file, we determined that it is impossible to conclude with sufficient certainty that the athlete’s sample returned an adverse analytical finding,” WADA said Tuesday in a statement to The Associated Press.

The 30-year-old Jenkins had been banned during the appeal process. She was defended by the Valparaiso University Sports Law Clinic.

“I am happy and relieved that this process of a year and nine months is over,” Jenkins said in a statement. “I intend to resume my athletic career when circumstances permit.”

She won a silver medal in the 200 meters at the 2001 world indoor championships and a bronze at the 2001 world outdoors.

Jenkins had been coached by Trevor Graham, who is charged with three felony counts of making false statements to federal investigators. The government has accused him of lying in 2004 when he denied distributing steroids or telling his athletes where they could get them. He is scheduled to go on trial next month.