General Prohibition P-119 was a law within the United Federation of Planets.
According to this regulation, no person or starship for any reason or circumstance was allowed to visit the UFC 465537 star system. The basis of the prohibition came as a result of the recommendation of the last three research expeditions to the Time Planet. This led to a unanimous vote by the Federation Council of General Prohibition P-119. (ST reference: The Worlds of the Federation)