Philadelphia Mayor Michael Nutter on Thursday signed an ordinance expanding rights for LGBT people in the city.

Nutter, president of the U.S. Conference of Mayors and a member of Mayors for the Freedom to Marry, a group of 300 plus mayors who have pledged to support efforts to legalize gay marriage in their states, said he hoped the measure would help Philadelphia become “the most LGBT-friendly” city in the world.

Among its provisions is a first-in-the-nation tax credit to companies that extend health care coverage to the domestic partners of LGBT workers and their children.

Officials said that the legislation also encourages businesses to provide transgender-specific health benefits through tax credits.

“For decades, the City of Philadelphia has been a leader on LGBT rights and gender equality with our protections and provisions on the basis of sexual orientation and gender identity and life partnership program. Signing this legislation today continues our long history of equality for every Philadelphian no matter who they love or their gender identity,” said Nutter. “I am proud that Philadelphia can be the first city in the nation to offer the Equality Tax Credit to employers who offer health benefits to same sex couples, life partners and transgender employees.”

The law also adds additional protections for transgender people, including adding gender identity to the city's anti-discrimination law and offering transgender-inclusive healthcare to city workers.

Councilman James Kenney sponsored the legislation, which the City Council easily approved last month.

“Equal protection under the law means equal protection under the law,” he told the AP.

Pennsylvania currently does not recognize the relationships of gay and lesbian couples with either marriage or civil unions.