Any town, school district, county, or village district may establish a reserve fund for the maintenance and operation of a specific public facility or type of facility, a specific item or type of equipment, or for any other distinctly-stated, specific public purpose that is not foreign to its institution or incompatible with the objects of its organization. Such funds shall be subject to all provisions and limitations of this chapter as are applicable to capital reserve funds. The legal validity of such a fund properly established shall not be affected by its designation as a “trust,” “reserve,” “capital reserve,” or any other designation.