(a) The insolvent lists of a tax collector or tax commissioner shall be allowed only by the county governing authority upon a return of the tax execution with entry by the proper legal officer of "no property."

(b) The county governing authority, if it has any reason to suspect the return of the officer to be incorrect in any particular, shall cause the execution to be sent out again for collection. Before the county governing authority allows any insolvent list, the officer in whose hands the tax fi. fas. have been placed for collection shall take an oath that he has made every effort in his power to collect the fi. fas. and that he verily believes the taxpayers on the list have no property from which the tax can be collected.