Section 16

it shall not be necessary to show that the accused person was guilty of a particular act tending to show a purpose prejudicial to the safety or interests of Malaysia;

notwithstanding that no act as stated in subsection (1) is proved against him, the accused person may be convicted if, from the circumstances of the case, his conduct or his known character as proved it appears that his purpose was a purpose prejudicial to the safety or interests of Malaysia; and

if any documents, articles or information relating to or used in any prohibited place or anything in such a place, or any secret official code word, countersign or password, is made, obtained, collected, recorded, published or communicated by any person other than a person acting under lawful authority, it shall be presumed until the contrary is proved, to have been made, obtained, collected, recorded, published or communicated for a purpose prejudicial to the safety or interests of Malaysia.

Certificate by a public officer to be conclusive evidence