From Postmasters.org – March 10, 2015
The below POV Program has been established to increase the use of vehicles by EAS while covering the personnel with insurance. In the current environment, anyone using their POV for postal use has been as risk. The League has been asking for some type of coverage for PM’s when using their POV for many years. Ms. Brennan had promised to resolve this known issue and thus this POV Program was created. It is important to note that this program is voluntary. It is also important to note that your involvement may be cancelled by either the Postal Service or by you at anytime. This is completely on you and your insurance company and the Tort Claim Process does not apply as it does with carriers and other employees. Please read the attached carefully before making your decision. This topic will be addressed in detail at your state conventions.
ESA POV (Privately Owned Vehicle) Program (PDF)

Mileage reimbursement?