Rehire part-time employee

Here is my question,
We had an employee that was laidoff on 3/00 due to I-695. We would like to rehire this employee on a part-time basis. Is there any legalities in doing this without having a open recruitment?
Thank you.
We had an employee that was laidoff on 3/00 due to I-695. We would like to rehire this employee on a part-time basis. Is there any legalities in doing this without having a open recruitment?
Thank you.