Help-wanted advertisements in New York will have to disclose proposed pay rates after a statewide salary transparency law goes into effect on Sunday, part of growing state and city efforts to give women and people of color a tool to advocate for equal pay for equal work.

Employers with at least four workers will be required to disclose salary ranges for any job advertised externally to the public or internally to workers interested in a promotion or transfer.

Pay transparency, supporters say, will prevent employers from offering some job candidates less or more money based on age, gender, race or other factors not related to their skills.

Advocates believe the change also could help underpaid workers realize they make less than people doing the same job.