I just pulled this from va form 21-8760: Honorably discharged veterans with 100 percent service-connected disability, and their dependents and unremarried surviving spouses, are entitled to unlimited exchange and commissary store privileges. Certification of total disability and DD Form 1172, Application for Uniformed Services Identification Card - DEERS Enrollment, will be provided by VA. You may contact the nearest VA regional office for assistance.
It just says total not permanent. I also found a pdf that says the id will expire 60 days after my reevaluation exem. If anyone knows if this is correct or not please let me know.