by any stamp or impression which has been previously used to denote payment of the postage or fee s on any other postal article or any other stamp duty or tax; (h) betting advertisements relating to illegal business; (i) fortune telling advertisements; (j) sweepstake or lottery tickets, or advertisement and other notices in relating to sweepstake or lottery that are unlawful; (k) money lenders circulars that are enclosed; (l) any article which infringes trade mark or copy right laws; (m) any sample packets consisting of literature for the blind containing any article liable to customs duty in the country or place of destination; (n) any living creature, other than bees, leeches and silk worms, parasites or destroyers for noxious insects; and (o) any other article which, is prohibited from being posted or accepted for transmission by post by the Act or these Regulations. (3) The prohibited postal articles may, in exceptional circumstances, be sent by post in accordance with the First Schedule to these Regulations. (4) Any person who contravenes this regulation commits an offence and is liable, on conviction, to a fine not exceeding three hundred thousand shillings or to imprisonment for a term not exceeding one year or both. 12. Postal security and safety. A postal licensee shall take reasonable steps to improve mail security and combat postal crimes that include among others— (a) mail violation; (b) mail bombs; (c) illicit drug trafficking or firearms; or