Commencing on April 17, 1982, an addition which has been approved pursuant to section 15-106 and is adjoining or contiguous to the corporate boundaries of a city of the primary class, but which (1) includes land which lies wholly or partially within the area designated as being for future urban uses in the comprehensive plan adopted by the city pursuant to sections 15-1102 and 15-1103 and (2) is set aside in such comprehensive plan as an agricultural-industrial reserve shall be included within the corporate limits of the city only upon the enactment of a city ordinance specifically annexing such addition.