Pennsylvania: 61 Pa. Code §§ 32.24, 38.2
61 Pa. Code § 32.24 (Sales to ambassadors, ministers and consular officers of foreign governments)
(a) Diplomatic exceptions. Sales to ambassadors, ministers and other diplomatic representatives of foreign governments are not subject to tax in accordance with provisions established by the Office of Foreign Missions, United States Department of State. The exemption from tax is evidenced by the tax exemption card issued by the United States Department of State. Restrictions on the exemption from tax will be indicated on the exemption card.
(b) Procedural requirements for diplomatic exemptions. A person entitled to the diplomatic exemption from the tax is required to make application to the Office of Foreign Missions, United States Department of State. This Federal agency will issue a Tax Exemption Card to each individual qualifying for exemption from tax. The Department will recognize the exemption from tax granted to these individuals in accordance with the restrictions provided on the tax exemption card.
(c) Sales made to individuals qualifying for diplomatic exemption from tax. A vendor shall retain a completed exemption certificate form which supports the tax exempt transaction. The Federal tax exemption number shall be included on the exemption certificate.
61 Pa. Code § 38.2 (Hotel Occupancy Tax- Exemptions)
(b) Ambassadors, ministers and consular officers of foreign governments. Ambassadors, ministers and other diplomatic representatives of foreign governments properly accredited to the United States, are exempt from tax upon their occupancy of rooms. This exemption does not apply to consular officers or to officers of foreign governments other than those specified in this section, unless such exemption arises from treaties or reciprocal agreements existing between such foreign governments and the United States.
(1) A person claiming exemption from the tax under this subsection is required to apply in writing therefor to the Bureau of Accounts Settlement, Department of Revenue, Harrisburg, Pennsylvania, Attention: Exemption Unit. Ambassadors, ministers and other diplomatic representatives of foreign governments should submit written proof that they are properly accredited to the United States. Consular officers and officials of foreign governments should submit written proof of the treaty or agreement under which similar exemption is granted by their country to consular officers and officials of the United States together with proof that such treaty or reciprocal agreement is presently in effect and that they are an officer or official entitled to prerogatives thereunder. If exemption has already been accorded under the sales and use tax portion of the TRC the numbered identification card is valid for hotel occupancy tax purposes.
(2) If the request for exemption is approved, a numbered identification card will be issued to the applicant. This card shall be shown by the exempt occupant to the hotel operator whenever a claim for exemption is made.