A. Any person as to whom or any occupancy as to which it is beyond the power of the City to impose the tax herein provided.

B. Any Federal or State of California officer or employee when on official business.

C. Any officer or employee of a foreign government who is exempt by reason of express provision of Federal law or international treaty.

No exemption shall be granted except upon a claim therefor made at the time rent is collected and under penalty of perjury upon a form prescribed by the Tax Administrator.