124. Official communications

No public officer shall be compelled to disclose communications made to him in official confidence when he considers that the public interest would suffer by the disclosure:

Provided that the court may require the head of the department of the officer to certify in writing whether or not such disclosure would be detrimental to the public interest and, if the head of the department certifies that such disclosure would not be prejudicial to the public interest, then the officer shall disclose the communications.