The Director of Finance may grant to any person who, by reason of physical infirmity, unavoidable misfortune, or unavoidable poverty, merits exemption from any license fee required by any provisions of this chapter, an exemption of one annual free license for the conduct of any one business licensed by any provisions of this chapter, provided, however, that when it appears to the satisfaction of the Director of Finance that the conditions which warranted an exemption under this section no longer exist, the director may revoke such exemption and the license issued. (Ord. 5017-NS § I (part), 1977)