The secretary or curator of the Nebraska State Historical Society shall prepare certified copies of any record, document or other material, of which the society is the custodian, whenever application shall be made to the society. Such certified copies shall be received in courts and elsewhere as being of the same legal validity as similar copies prepared by the original custodian of the record, document or other material. The secretary or curator of the society shall be entitled to the same fees for making certified copies as the original custodian would be.