For-hire drivers must adhere to which of the following principles?

For-hire drivers are required to follow non-discriminatory practices in passenger service to ensure that all individuals have equal access to transportation services without bias based on race, gender, ethnicity, or other personal characteristics. This principle is vital because it promotes fairness and equality, which are essential in the transportation industry. Adhering to non-discriminatory practices helps create a more inclusive environment for all passengers and builds trust within the community.

The other options present practices that are not mandated for for-hire drivers. Operating only during daylight hours can be impractical and limits the availability of services. Providing complimentary snacks and drinks is not a requirement and could impose additional costs without guaranteeing customer satisfaction. Offering competitive pricing is a good business practice but is not an absolute principle that must be adhered to in all cases.