If the office of coroner has been abolished in a county by referendum and the referendum did not provide for the performance, by another person, of the duties previously performed by the coroner, the county board shall select a person to perform the duties previously performed by the coroner. The selection shall be made within 60 days after the referendum or within 60 days after the effective date of this amendatory Act of 1992, whichever is later. If the sheriff of the county is selected to perform the duties previously performed by the coroner and the sheriff agrees to perform those duties, the sheriff may be compensated for performing those duties. This compensation shall be in addition to all other compensation received in his or her capacity as sheriff. If, before the effective date of this amendatory Act of 1992, a county has abolished the office of coroner by a referendum that did not provide for someone to perform the duties previously performed by the coroner, and the sheriff of the county is performing those duties, the sheriff must be reappointed by the county board under this Section in order to continue to perform those duties and to receive the additional compensation authorized under this Section.