No county which has timely met all of its obligations under this article is liable for any payments or contributions to the deputy sheriff retirement plan which are owed to the plan by another county or counties. No county commission may deposit funds into the deputy sheriff retirement fund in excess of the amount specified in section seven of this article, the fees set forth in article fourteen-e of this chapter, the fees set forth in subsection (f)(2), section one, article ten-d, chapter five of this code, and the fees set forth in section seventeen, article three, chapter seventeen-a of this code.