The National Press Club on Tuesday made its submission to the National Council of Provinces at a public hearing on the Protection of State Information Bill (POIB) in Tshwane.
Hearings are taking place in Mamelodi, just east of Pretoria and in Sharpville in Johannesburg.
The National Press club's Yusuf Abramjee told the hearing that if the bill is passed into law, it will sanction widespread censorship.
He concedes that every government needs secrets, but said proposed clauses in the bill are unconstitutional.
Abramjee called for further review of the bill to include a public interest clause, arguing that in it is current form. It is open to abuse.
Several other members of the community have had an opportunity to address the panel, but have mostly raised council issues.
(Edited by Clare Matthes)