Anything can be sent in a parcel except articles whose transmission is prohibited. It can contain single communication to the addressee of the parcel. If the parcel is suspected to contain other than the permitted communication, it will be opened in the presence of the addressee or his authorized agent, and each written communication will be charged on delivery with double the letter postage. If the addressee refuses to pay the charges, the parcel will be returned to the sender from whom the charge will not be recovered.
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