All proceedings at the location for central counting shall be under the direction of the county clerk or board of election commissioners. Except for any specially trained technicians required for the operation of the automatic Precinct Tabulation Optical Scan Technology tabulating equipment, the employees at the counting station shall be equally divided between members of the 2 leading political parties and all duties performed by the employees shall be by teams consisting of an equal number of members of each political party. Thirty days before an election the county clerk or board of election commissioners shall submit to the chair of each political party, for his or her approval or disapproval, a list of persons of his or her party proposed to be employed. If a chair fails to notify the election authority of his or her disapproval of any proposed employee within a period of 10 days thereafter the list shall be deemed approved.