The receiving State shall, in accordance with such laws and regulations as it may adopt, permit entry of, and grant exemption from all customs duties, taxes, and related charges other than charges for storage, cartage and similar services on the following articles, provided that they are for the official use of a consular post headed by an honorary consular officer: coats-of-arms, flags, signboards, seals and stamps, books, official printed matter, office furniture, office equipment and similar articles supplied by or at the instance of the sending State to the consular post.