N.H. Rev. Stat. § 225-A:13
Any person may make written complaint to the board setting forth any thing or act claimed to be done or omitted to be done by any registered operator which is alleged to be in violation of any rule, regulation or code adopted by the board, or setting forth any condition in passenger tramway construction, operation or maintenance which is alleged to endanger the safety of the public. Thereupon the board shall cause a copy of said complaint to be forwarded to the registered operator complained of, which may be accompanied by an order requiring that the matters complained of be answered in writing within a time to be specified by the board. The board may investigate the matter complained of if it shall appear to the board that there are reasonable grounds therefor.
RSA 225-A:13
1957, 254:1. 1987, 124:6, I(b). 1988, 151:14, eff. June 20, 1988.