No person receiving remuneration from the City holding an appointive office or place in the service of the City shall directly or indirectly give, solicit or receive, or be in any manner concerned in giving, soliciting or receiving, any assessment, subscription or contribution for any political party or political purpose whatever. Nor shall such person orally or by letter solicit or be in any manner concerned in soliciting any assessment, subscription or contribution for any political party or political purpose from any person holding a position in the administrative service. Nor shall such person use or promise to use his influence or official authority to secure any appointment or prospective appointment, to any position in the service of the City as a reward or return for personal or partisan political service.