Title: Presidential Decree no. 857
Subtitle: Revised Charter of the Philippine Ports Authority : as amended by Executive Order no. 513 dated 16 November 1978, Executive Order no. 546 dated 23 July 1979, Letter of instruction no. 1005-A dated 11 April 1980, Executive Order no. 710 dated 27 July 1981, Executive Order no. 783 dated 165 [sic] March 1982, Executive Order no. 159 dated 13 April 1987.