N.H. Code Admin. R. Saf-C 3117.14 – CDL Driving Lesson

(a) CDL behind-the-wheel instruction shall not exceed 4 hours a day per student.
(b) No CDL instructor shall provide more than 10 hours of instruction during a 24 hour period.
Source. #9568, eff 10-17-09 (from Saf-C 3120.09); ss by #12509, eff 4-5-18 (formerly Saf-C 3121.14) (See Revision Note at chapter heading for Saf-C 3100)
Saf-C 3118 CDL INSTRUCTOR QUALIFICATIONS