Cosas says the tradition of publishing results should be scrapped as it infringes privacy rights.
Education MEC Panyaza Lesufi says if the pass rate drops, he will replace the head of the department.
MPs will investigate the decline in the matric pass rate at schools in two districts.
Western Cape universities will not accept late admissions under any circumstances.
Universities across SA have been inundated with thousands of applications for first-year studies.
Opposition parties, education experts and the public are questioning the credibility of the pass rate.