(CNN)Surfer Bethany Hamilton says she won't compete at future World Surf League (WSL) events if it upholds its new policy on transgender athletes, saying she wants to see a different division created for transgender people to compete in.
The WSL recently announced it would be adopting the International Surfing Association (ISA) policy on transgender participation, which requires trans-female athletes to maintain a testosterone level of less than five nmol/L for at least 12 months in order to compete in the women's division.
In a video posted on Instagram Sunday, Hamilton asks, "Is a hormone level an honest and accurate depiction that someone indeed is a male or female? Is it as simple as this?"
"I personally won't be competing in or supporting the World Surf League if this rule remains," she said.
Hamilton -- a devout Christian - says the new rule "concerns" her as a professional athlete who has competed in the WSL for over 15 years.
The rules allows an athlete who was assigned male at birth, and now identifies as a woman, to compete in women's events, if their testosterone levels meet the requirements to compete as a woman.
"I personally think that the best solution would be to create a different division so that all can have a fair opportunity to showcase their passion and talent," she added.