No appointing authority shall fill or request to fill any vacant position in the classified service under the appointing authority's jurisdiction through any of the methods for filling vacant positions, as stipulated in Sections 16-147 and 16-148 above, with a member of the appointing authority's family. As used in this Section, the term "family" shall mean and include the appointing authority's spouse, child, parent, grandparent, grandchild, brother, sister, brother- or sister-in-law, mother- or father-in-law, or son- or daughter-in-law.