N.H. Code Admin. R. Saf-C 3223.04
Registered farm vehicles, self-propelled combines, self-propelled corn and hay-harvesting machines or tractors used exclusively for agricultural purposes shall be exempt from the tread depth requirements of these rules.
Source. (See Revision Notes at Chapter Heading Saf-C 3200) #8915, eff 6-22-07, EXPIRED: 6-22-15 New. #10886, INTERIM, eff 7-16-15, EXPIRES: 1-12-16; ss by #11016, eff 1-6-16