Applicable to Guilford County only, requires a .25% local sales and use tax levied pursuant to GS 105-537 to be approved in a referendum. Amends GS 105-538 to restrict use of the net proceeds of the .25% sales and use tax levied to any public purpose or public school capital outlay purposes; provides ballot language for each use. Requires that the county maintain at least the same amount of public school capital outlay funding as in the fiscal year prior to the fiscal year in which voters approve using the local sales and use tax for public school capital outlay purposes, as defined. Makes conforming changes.