My understanding is that there are a few organized groups of non-Jews who strive to follow the Noahide laws. Just like Jews, B'nei Noach might have situations where the correct action to take is unclear. When Jews have such a problem, they ask a competent halachic authority their question. Presumably, there must be an equivalent type of "posek" who can answer the questions of the non-Jews and determine what their halacha is.
Are there any people who are known as prominent poskim for non-Jews? Are these poskim rabbis or are they non-Jews?