N.H. Rev. Stat. Ann. § 266-A:21

I. The commissioner shall regulate common and contract carriers by motor vehicle.

II. The commissioner shall administer and enforce RSA 266-A and shall adopt rules, pursuant to RSA 541-A, relative to the administration of RSA 266-A.

III. The commissioner may adopt rules, pursuant to RSA 541-A, relative to:

(a) Levels of service;

(b) Transportation of baggage and express;

(c) Account and record systems;

(d) Preservation of records and accounts; and

(e) Safety of operation and equipment.