The board of township supervisors of an organized township or the board of county commissioners for an unorganized township, may provide funding from revenue derived from the general fund levy authority for the township levy on property within the township for a legal contingency expenditure. Funding authorized under this section may be used only for purposes of expenses of legal actions authorized or entered into by the governing body of the township or the county, on behalf of unorganized townships. A levy under this section authorized by electors of an organized or unorganized township before January 1, 2015, remains effective for five taxable years or the period of time for which it was approved by the electors, whichever is less. Upon expiration of any mill levy authorized by electors of an organized or unorganized township before January 1, 2015, under this section, the governing body of the township or county may, by resolution, transfer any unobligated balance in the legal contingency fund to the general fund of the township or county.