(a) disclose information to a person in the service of the Government in a revenue or statistical department where the information is needed for the purposes of the official duties of that person solely for revenue or statistical purposes; and

(b) subject to such reciprocal arrangements as may be agreed upon by him, furnish to the competent authorities of a foreign country any information, certificate, official report or other document with a view to the prevention, investigation or suppression of offences against the laws and regulations applicable to the importation or exportation of goods into or from the territory of that foreign country.