§ 77. Police officers at annual fair. The board of commissioners of the Niagara frontier police district may, upon the written request of at least five of the councilors of the Seneca nation, detail two or more police officers of such district to attend and preserve peace and good order at the annual fair of the Iroquois agricultural society on the Cattaraugus reservation; the reasonable expenses of such police officers to be defrayed by such nation.