important question of federal law is involved. Conflicts between the Puerto Rico courts and the federal court do arise from time to time. According to the 1952 Constitution of Puerto Rico, the jurisdiction of the Supreme Court is only for laws of the Commonwealth of Puerto Rico. However, on several occasions the U.S. District Court for the District of Puerto Rico has taken jurisdiction on cases having to do with Puerto Rican law. In 2016, the US Supreme Court decided in the case of Puerto Rico v. Sanchez Valle that on the point of double jeopardy, Puerto Rico was not sovereign; thus it could not charge someone with crimes that the person had already been tried for by the United States. 2004 general election A highly controversial instance occurred in November 2004, when the Supreme Court of Puerto Rico declared that all ballots should be counted during the Puerto Rican general election, 2004. The New Progressive Party brought the matter to the Federal Court and claimed that some of the ballots were applied. Federal Judge Daniel Dominguez took jurisdiction of the case, in a ruling that would effectively have nullified the decision of the Supreme Court. However, on December 15, 2004, the First Circuit Court reversed Dominguez's decision and found that questions on the electoral process of Puerto Rico are matters reserved for the Puerto Rico local court system, headed by the Supreme Court of Puerto Rico. See also List of Justices of the Supreme Court of Puerto Rico by court Court of Appeals for the First Circuit Puerto Rico Federal District Court Courts of the United States State court (United States)#Nomenclature Trial court Judiciary of Puerto Rico Luis Muñoz Rivera Park References External links – official site, in Spanish. Judiciary of Puerto Rico Puerto Rico 1900 establishments in Puerto Rico Courts and tribunals established in 1900