An exemption shall be granted to any person as to whom or whose occupancy it is beyond the power of the city to tax. No exemption shall be granted except upon a claim therefor made at the time the rent is collected and a claim shall be made in writing and under penalty of perjury on forms provided by the Tax Administrator. All the claims shall be forwarded to the Tax Administrator when the returns and collections are submitted as required by this section.
(1989 Code, § 6.32, Subd. 5)