PART II
POWERS OF COURTS AND SPECIAL AREAS
20A. Information to be supplied on arrest
(6) Where the person is arrested, the police officer shall promptly inform him that he has the right to remain silent, and shall warn him of the consequences of making any statement, but any omission by the police officer to inform the arrested person of this right shall not render the arrest unlawful.
Rights during investigation - self incrimination
Rights during investigation - remain silent
EDIT.