New Jersey Governor Chris Christie on Monday vetoed a bipartisan bill that sought to ease access to birth certificates for transgender people.

The bill sought to allow transgender people who have not undergone gender reassignment surgery to seek changes to their birth certificates.

Under current New Jersey law, surgery is a requirement for people seeking to change their birth certificates.

Christie, also a candidate for the Republican presidential nomination, said that he vetoed the bill because it raises “security concerns and legal uncertainties.”

“Birth certificates unlock access to many of our nation and State's critical and protected benefits such as passports, driver's licenses, and social services, as well as other important security-dependent allowances,” Christie wrote in a veto message. “Accordingly, I remain committed to the principle that efforts to significantly alter State law concerning the issuance of vital records that have the potential to create legal uncertainties should be closely scrutinized and sparingly approved.”

Christie vetoed a similar bill last year.

The National Center for Transgender Equality (NCTE), which lobbied for passage of the bill, said that Christie's veto kept in place an outdated requirement.

“For the second time, Governor Chris Christie has elected to allow his state's birth certificate laws to deteriorate despite the overwhelming majority of support from the New Jersey legislature to modernize,” the group's Arli Christian said in a statement. “His veto on this bill keeps in place outdated and burdensome requirements that make it incredibly difficult for transgender people to get birth certificates that match who they are. Birth Certificates play an enormous role in transgender people's ability to live their life as the person that they are. And Governor Christie has – for a second time – vetoed legislation denying that for transgender New Jerseyans.”