The Marriage Law Project monitors the progress of state and federal legislation regarding marriage and same-sex unions. It provides information regarding headline news, current legislative progress, various arguments against same-sex marriage, case and statute law, news reports, and links to other resources. The Marriage Law Project is a frequent contributor as a spokesperson in the cultural homosexuality debates, especially from a Roman Catholic point of view. MLP participated in filing the injunction against San Francisco when that city's clerk decided to issue same-sex marriage licenses.