On your question 1, in the decision, the Court recognized (slip op. at 26):
On your question 2, the Court noted that there were a great number of rights and benefits that were available to married couples that were denied to committed same-sex couples. (See slip op. at 43-48) The Court concluded that: “We now hold that under the equal protection guarantee of Article I, Paragraph 1 of the New Jersey Constitution, committed same-sex couples must be afforded on equal terms the same rights and benefits enjoyed by married opposite-sex couples.” (slip op. at 57)
The Court found that, given 1 and 2, the state was acting unconstitutionally, and as such, the Court had to fashion a remedy. What the remedy can be is limited by the inherent power of the judiciary. In essence, the judiciary can interpret the law, and once it determines what the law is, it can order other government officials to follow the mandates of the law. However, the judiciary cannot tell a government official how to act when the law allows that official to act with discretion (assuming that the official is acting within the scope of his or her discretion).
Applying these principles, the court system cannot tell the legislature how to legislate, because legislation is an inherently discretionary act. However, if the courts determine that state officials are carrying out their functions in violation of the constitution or the law, they can order those officials to act in conformity with the law.
Let’s start with the partial dissent. Chief Justice Poritz concludes: “I would extend the Court’s mandate to require that same-sex couples have access to the ‘status’ of marriage and all that the status of marriage entails.” (dissent slip op. at 19-20) Because this is a dissent, the opinion does not actually have say what specific remedy it would have ordered. However, it seems likely to me that had the Chief Justice’s view been the majority, he would concluded that the state constitution required that marriage be open to couples of any sex, and ordered the state officials who were the defendants to issue licenses to any otherwise qualified couples who applied whether they were of the same sex or mixed sexes. If any other state official then tried to deny a same-sex couple a marriage license, or deny a married same-sex couple any of the rights and privileges given to married hetrosexual couples, the aggrieved couple would have an open and shut case against the offending official. If an official disobeyed a specific court order directing him or her to do something (or refrain from doing something), the court could find the official in contempt, and if necessary order him or her jailed until he or she complied.
Ordering state officials to recognize same-sex marriage on an equal basis with hetrosexual marriage is something that would be clearly within the judicial power. But what the majority concluded was that all the constitution required was that same-sex couples be afforded equal legal rights with heterosexual married couples, and that recognition of same-sex marriage as such was not required. However, it would be very difficult – perhaps impossible – for the Court to fashion a remedy within the scope of judicial power that equalizes the legal rights of same-sex couples who wish to be in a similar status to marriage with those heterosexual couples that are married.
So what is the Court to do? Because there isn’t anything compelling the Court to act immediately, it can give the state as a whole (acting through its legislature) time to bring its law into conformity with the state constitution, as recently interpreted by the Court. If the legislature takes the opportunity to act within the specified time, everything works out great.
The Court, however, left open what would happen if the legislature failed to act, and there was no reason for the Court to necessarily have determined what it would do in that “what if” scenario. Should it come to pass, however, the Court would most likely conclude that it had do do something, and that the something it would do would have to be within the judicial power. In my view, the most likely and reasonable thing for the Court to do if the legislature fails to act within 180 days (and any additional time the Court may grant), would be to order state officials to recognize same-sex marriage on the same basis as heterosexual marriage.