(2) Ad Valorem Method. - The net proceeds of the tax collected in a taxing county shall be distributed to that county and the municipalities in the county in proportion to the total amount of ad valorem taxes levied by each on property having a tax situs in the taxing county during the fiscal year next preceding the distribution. For purposes of this section, the amount of the ad valorem taxes levied by a county or municipality includes ad valorem taxes levied by the county or municipality in behalf of a taxing district and collected by the county or municipality. In addition, the amount of taxes levied by a county includes ad valorem taxes levied by a merged school administrative unit described in G.S. 115C-513 in the part of the unit located in the county. In computing the amount of tax proceeds to be distributed to each county and municipality, the amount of any ad valorem taxes levied but not substantially collected shall be ignored. Each county and municipality receiving a distribution of the proceeds of the tax levied under this Article shall in turn immediately share the proceeds with each district in behalf of which the county or municipality levied ad valorem taxes in the proportion that the district levy bears to the total levy of the county or municipality. Any county or municipality that fails to provide the Department of Revenue with information concerning ad valorem taxes levied by it adequate to permit a timely determination of its appropriate share of tax proceeds collected under this Article may be excluded by the Secretary from each monthly distribution with respect to which the information was not provided in a timely manner, and those tax proceeds shall then be distributed only to the remaining counties or municipalities, as appropriate. For the purpose of computing the distribution of the tax under this subsection to any county and the municipalities located in the county for any month with respect to which the property valuation of a public service company is the subject of an appeal and the Department of Revenue is restrained by law from certifying the valuation to the county and the municipalities in the county, the Department shall use the last property valuation of the public service company that has been certified. The board of county commissioners in each taxing county shall, by resolution adopted during the month of April of each year, determine which of the two foregoing methods of distribution shall be in effect in the county during the fiscal year following the succeeding fiscal year. In order for the resolution to be effective, a certified copy of it must be delivered to the Secretary in Raleigh within 15 calendar days after its adoption. If the board fails to adopt a resolution choosing a method of distribution not then in effect in the county, or if a certified copy of the resolution is not timely delivered to the Secretary, the method of distribution then in effect in the county shall continue in effect for the following fiscal year. The method of distribution in effect on the first of July of each fiscal year shall apply to every distribution made during that fiscal year.