What is one requirement for carrying passengers for hire during night flights?

The requirement for carrying passengers for hire during night flights is that the pilot must hold an instrument rating. This is essential for ensuring that pilots have the necessary skills and knowledge to operate safely in potentially challenging conditions that night flying may present, such as reduced visibility and the need for navigating solely by instruments.

Having an instrument rating indicates that a pilot is trained and competent to fly under Instrument Flight Rules (IFR), which are critical during nighttime operations, especially when dealing with low clouds, fog, or other situations that restrict visual references.

The other options do not reflect the regulatory requirements: operating under VFR only is not consistent with nighttime operations when IFR may be necessary; limiting distance to 50 NM does not have any standard regulation connected to night flights; and avoiding class G airspace is not a requirement — pilots can operate in Class G airspace at night but must still adhere to the necessary instrument and operating requirements.