They shouldn't need to redo the comprehensive plan in toto. Unless it is unrealistic, the PC simply can re-adpot the existing one, according to KRS 100-197 (1) [part], viz:
Originally posted by Cardinal
At least once every five (5) years, the commission shall amend or readopt the plan elements. It shall not be necessary to conduct a comprehensive review of the research done at the time of the original adoption pursuant to KRS 100.191, when the commission finds that the original research is still valid. The amendment or readoption shall occur only after a public hearing before the planning commission.
The news story had it backwards, B.T.W:
The zoning problems aren't the only things that could affect property owners. It turns out the county's comprehensive plan, which is based on zoning, hasn't been updated since 2002. –WPSD/6 13 May 2013.
Kentucky is also on of those commonwealths/states that require concordance with the comprehensive plan, according to KRS 100.213, viz:
Before any map amendment is granted, the planning commission or the legislative body or fiscal court must find that the map amendment is in agreement with the adopted comprehensive plan, or, in the absence of such a finding, that one (1) or more of the following apply and such finding shall be recorded in the minutes and records of the planning commission or the legislative body or fiscal court:
(a) That the existing zoning classification given to the property is inappropriate and that the proposed zoning classification is appropriate;
(b) That there have been major changes of an economic, physical, or social nature within the area involved which were not anticipated in the adopted comprehensive plan and which have substantially altered the basic character of such area.
With a name like "McCracken," you don't need this kind of problem.