The official bond provided for in section ten of this article, relating to county clerks, shall be deemed to apply only to collection of local fees. The State Auditor, on behalf of the general school fund, and the state conservation commissioner, on behalf of the state conservation commission, shall require from the county clerk of any county such additional bonds as are deemed necessary, and in such amounts as are deemed adequate to protect the general school funds and the state conservation funds in the hands of such clerk. The Auditor and the state conservation commissioner shall require corporate surety bonds and pay the necessary premiums from the said general school funds and the said state conservation fund on said additional bonds, but the amount of such additional bonds shall not exceed the amount of the state funds handled by such clerk during the preceding fiscal year.