The lawyers representing the petitioners included Ramon A. Gonzales, Lorenzo Tañada, Jovito Salonga, Sedfrey Ordoñez, Francisco 'Soc' Rodrigo, Pablo Sanidad, Joker Arroyo and Rogelio B. Padilla, and Raul M. Gonzalez.
The Supreme Court at that time consisted of Chief Justice Roberto Concepcion, and Associate Justices Querube Makalintal, Calixto Zaldivar, Fred Ruiz Castro, Enrique Fernando, Claudio Teehankee, Antonio Barredo, Felix Makasiar, Felix Antonio and Salvador Esguerra.