Educational Assistance Program repayment obligation

[7806akp]

Would an obligation to continue employment for 2 years after receipt of a tuition reimbursement be considered a "reasonable condition subsequent" under Reg. 1.127-2 so that  a repayment obligation upon a termination of employment prior to the end of the 2-year period would not, on its own, cause an educational assistance plan to be discriminatory? The regulation includes the example of a 1-year continued employment requirement, but it is not clear if a longer period could also be considered reasonable.