20 CFR 1002.123 : Employees' Benefits (§ 1.1 To Parts 1011-1099) — (Part 657 To Parts 1011-1099) — Office Of The Assistant Secretary For Veterans' Employment And Training Service, Department Of Labor (Part 1000 To Parts 1011-1099) — Regulations Under The Uniformed Services Employment And Reemployment Rights Act Of 1994 (§ 1002.1 To Appendix To Part 1002) — Eligibility For Reemployment (§ 1002.32 To § 1002.139) — Application For Reemployment (§ 1002.115 To § 1002.123) — What documents satisfy the requirement that the employee establish eligibility for reemployment after a period of service of more than thirty days?