PHOENIX (AP) -- A transgender woman who is an advocate for sex workers plans to file an appeal Tuesday of her conviction in Arizona on a prostitution-related charge. 

Lawyers for Monica Renee Jones are expected to argue that the Phoenix ordinance under which she was convicted should be thrown out because it's unconstitutionally overbroad and violates free-speech rights. 

She was convicted in April under the ordinance that prohibits people from demonstrating an intent to sell sex in public places by flagging down passers-by and motorists, asking whether someone is a police officer or taking other steps.

Jones will be joined at a Tuesday news conference by Laverne Cox, a transgender actress who stars as a transgender character in the Netflix prison series, ``Orange is the New Black.''