When the Court grants a cert petition, the case is set for oral argument. Both parties will file briefs on the merits of the case, as distinct from the reasons they may have argued for granting or denying the cert petition. With the consent of the parties or approval of the Court, amici curiae, or "friends of the court", may also file briefs. The Court holds two-week oral argument sessions each month from October through April. Each side has thirty minutes to present its argument (the Court may choose to give more time, though this is rare), and during that time, the Justices may interrupt the advocate and ask questions. The petitioner gives the first presentation, and may reserve some time to rebut the respondent's arguments after the respondent has concluded. Amici curiae may also present oral argument on behalf of one party if that party agrees. The Court advises counsel to assume that the Justices are familiar with and have read the briefs filed in a case.
Supreme Court bar.
In order to plead before the court, an attorney must first be admitted to the court's bar. Approximately 4,000 lawyers join the bar each year. The bar contains an estimated 230,000 members. In reality, pleading is limited to several hundred attorneys. The rest join for a one-time fee of $200, earning the court about $750,000 annually. Attorneys can be admitted as either individuals or as groups. The group admission is held before the current justices of the Supreme Court, wherein the chief justice approves a motion to admit the new attorneys. Lawyers commonly apply for the cosmetic value of a certificate to display in their office or on their resume. They also receive access to better seating if they wish to attend an oral argument. Members of the Supreme Court Bar are also granted access to the collections of the Supreme Court Library.
Decision.
At the conclusion of oral argument, the case is submitted for decision. Cases are decided by majority vote of the Justices. It is the Court's practice to issue decisions in all cases argued in a particular term by the end of that term. Within that term, however, the Court is under no obligation to release a decision within any set time after oral argument.
After the oral argument is concluded, usually in the same week as the case was submitted, the Justices retire to another conference at which the preliminary votes are tallied and the Court sees which side has prevailed. One of the Justices in the majority is then assigned to write the Court's opinion—also known as the "majority opinion". This assignment is made by the most senior Justice in the majority (with the Chief Justice always being considered the most senior). Drafts of the Court's opinion circulate among the Justices until the Court is prepared to announce the judgment in a particular case. Justices are free to change their votes on a case up until the decision is finalized and published. In any given case, a Justice is free to choose whether or not to author an opinion or else simply join the majority or another Justice's opinion. There are several primary types of opinions:
Opinion of the Court: this is the binding decision of the Supreme Court. An opinion that more than half of the Justices join (usually at least five Justices, since there are nine Justices in total; but in cases where some Justices do not participate it could be fewer) is known as "majority opinion" and creates binding precedent in American law. Whereas an opinion that fewer than half of the Justices join is known as a "plurality opinion" and is only partially binding precedent.
Concurring: when a Justice "concurs", he or she agrees with and joins the majority opinion but authors a separate concurrence to give additional explanations, rationales, or commentary. Concurrences do not create binding precedent.
