Final answer:
Milewise is a pay-per-mile insurance program that may not be available with certain insurance plans or in certain areas due to regulations or company policies. Specifics on YCA plans that do not allow Milewise usage are not provided, so direct consultation with insurance providers is advised.
Step-by-step explanation:
The Milewise program is typically offered by car insurance companies as a pay-per-mile insurance option for drivers who wish to save on their insurance by paying based on the number of miles they drive. This program might not be available in conjunction with other specific insurance plans or within certain states due to regulatory reasons, driving habits, vehicle eligibility, or company policies.
Unfortunately, without more context regarding 'YCA plans,' it isn't possible to provide a comprehensive list of which plans do not allow the use of Milewise.
To get the most accurate information, it's recommended to consult directly with insurance providers or refer to the terms and conditions of the plans they offer.