The Post-Widows Tax Repeal SBP Open Enrollment for Service-Disabled Veterans Act This bill establishes an open enrollment period for the Survivor Benefit Plan for a member or former member of the uniformed services who, on the day before the first day of the enrollment period, discontinued participation in the Survivor Benefit Plan (due to spousal eligibility for dependency and indemnity compensation), and is entitled to retired pay, or would be entitled to retired pay but for the fact the individual is under 60 years of age.