N.H. Code Admin. R. Saf-C 3212.01
When inspecting brakes, the authorized mechanic shall remove at least one front and one rear wheel. If the authorized mechanic detects or suspects a problem with one or more of the brakes, all 4 wheels must be removed and inspected.
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