On September 27, 1972, Marcos issued Letter of Instructions No. 13, which he claimed would "uphold morality in the youth". However, the ban was instead used to stifle dissent and to maintain the propaganda of the government at the time. Among the films banned were Hubad na Bayani (1977), Manila By Night (1980), Bayan Ko: Kapit sa Patalim (1984), among many others. The letter stated 7 kinds of films that were not to be exhibited in any local theater:
