14 CFR § 61.89 - General limitations.
(a) A student pilot may not act as pilot in command of an aircraft:
(1) That is carrying a passenger;
(2) That is carrying property for compensation or hire;
(3) For compensation or hire;
(4) In furtherance of a business;
(5) On an international flight, except that a student pilot may make solo training flights from Haines, Gustavus, or Juneau, Alaska, to White Horse, Yukon, Canada, and return over the province of British Columbia;
(6) With a flight or surface visibility of less than 3 statute miles during daylight hours or 5 statute miles at night;
(7) When the flight cannot be made with visual reference to the surface; or
(8) In a manner contrary to any limitations placed in the pilot's logbook by an authorized instructor.
(b) A student pilot may not act as a required pilot flight crewmember on any aircraft for which more than one pilot is required by the type certificate of the aircraft or regulations under which the flight is conducted, except when receiving flight training from an authorized instructor on board an airship, and no person other than a required flight crewmember is carried on the aircraft.
(2) At night;
(4) In Class B, C, and D airspace, at an airport located in Class B, C, or D airspace, and to, from, through, or on an airport having an operational control tower without having received the ground and flight training specified in § 61.94 and an endorsement from an authorized instructor;
(d) The holder of a student pilot certificate may act as pilot in command of an aircraft without holding a medical certificate issued under part 67 of this chapter provided the student pilot holds a valid U.S. driver's license, meets the requirements of § 61.23(c)(3), and the operation is conducted consistent with the requirements of paragraphs (a) and (b) of this section and the conditions of § 61.113(i). Where the requirements of paragraphs (a) and (b) of this section conflict with § 61.113(i), a student pilot must comply with paragraphs (a) and (b) of this section.