In each biennium, highway fund appropriations, including costs of collections of the department of safety, shall be subject to the following limitations:
RSA 9:9-b
2003, 263:1. 2008, 237:1, eff. July 1, 2009; 237:2, eff. July 1, 2011; 237:3, eff. July 1, 2013. 2015, 276:191, eff. July 1, 2015.