(2) The right of the county court of Morrow County to divert and store the waters of Ditch Creek, acquired under the certificate issued by the Water Resources Director licensing such diversion and storage, shall date from the time the application to divert and store such waters was filed. The waters shall be used for the purposes, in the manner and under the conditions set forth in the certificate, for such time as the use is for the public interest. If the waters are not used under the license for a five-year period, the license shall expire.