In Europe, roller derby was recognized as a sport in Paris in 2010 by the Federation Internationale de Roller Sports (FIRS), which reports directly to the International Olympic Committee. As of 2017, FIRS has been accepted as the international rule set by the International Olympic Committee. Teams competed under the FIRS rules at the 2017 Nanjing Games. The former Canadian Women's Roller Derby Association worked with the American federation. Since 2006, the WFTDA has sponsored an annual championship. In 2008, it adopted the "Big 5" format: four regional playoffs and a final championship tournament. As of 2019, the WFTDA postseason includes two playoffs that feed into the Championship tournament, plus three standalone, regionally-based Continental Cups. The WFTDA also recognizes eligible tournaments hosted by member leagues. Internationally, the first Roller Derby World Cup took place in Toronto, Canada, in December 2011. The second World Cup took place in Dallas, Texas, in December 2014. Since 2012, USARS has held an annual Roller Derby National Championship. In 2017, FIRS and the USOC recognized USARS to participate in the 2017 Nanjing games. The largest roller derby tournament in the southern hemisphere, The Great Southern Slam, has been held biannually in Adelaide, South Australia since 2010. Zaina Arafat asserts in "Virginia Quarterly Review" that roller derby defies heteronormativity and patriarchal standards. In Egypt, Arafat says, there are expectations that a woman will not show visible scars, will have an unblemished body for her husband, and will refrain from activities that may damage her body. She says roller derby in Egypt is subversive, as it acts as an indirect political statement. Carly Giesler states that skaters enact sexualities that create or reclaim an identity, and their role parodies "hegemonic scripts of sexuality" through the use of costumes, derby names and personas. Roller derby acts as a unique stage for female athletes, letting them rebut constraints society places on women and female athletes. Giesler argues that female sports objectifies them for the male gaze, but roller derby turns this on its head by disregarding gender roles and norms.