Despite having a Master’s in educational leadership from Harvard University, teacher Ashley Croft can’t become a principal in Tennessee because of the state’s licensing process.

Officials say since 2009, the state allows only for principals to graduate from an approved in-state college or university master’s program. Out-of-state applicants must have at least three years of experience as a principal to receive a license.

Croft went to Harvard in 2013. It wasn’t until she enrolled there that she found Tennessee’s licensing process doesn’t recognize Harvard’s program.

The education department is reviewing its licensing process, and Croft has filed an online petition telling the state to amend its policies. So far, the petition has gained more than 700 signatures.