Employment Law Questions? Ask an Employment Lawyer.
If hours beyond your restrictions are an essential function of the job, and you cannot work those hours, there is no accommodation they can make for you that would allow you to work that job. Thus, yes they could legally prohibit you from transferring. However, if the hours are not essential to the position, then no they cannot. We would need to see a job description etc. to know if the hours requirement is an essential function of the position.
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