North Dakota Century Code Title 49. Public Utilities § 49-21-01.5. Access code number usage

A person who, in the ordinary course of operations, makes telephones available to the public or to transient users of that person's premises, for intrastate telephone calls using a provider of operator services shall ensure that each of its telephones presubscribed to a provider of operator services allows the consumer to use “toll free ‘8XX’ ”, “950”, or “101XXXX 0+” access code numbers to obtain access to the provider of operator services desired by the consumer. Each such person shall ensure that no charge to the consumer for using a “toll free ‘8XX’ ”, “950”, or “101XXXX 0+” access code number is greater than the amount charged for calls placed using the presubscribed provider of operator services.