It is a general clause to have transfer option.
Reasonable notice can be one month or a stipulated/agreed timeline.
Transfer orders can be issue at the time of such deputation to another place.
Format for the deputation/transfer will be provided by your company.
There would be on employer who would force you to work if you have medical issues.
But you have not mentioned your company's nature, is it a Factory or Software company or other service sector?
3rd May 2018 From India, Hyderabad
4th May 2018 From India, New Delhi
If your company does not have any transfer order they have to develop. How would they communicate with the deputed branch/office is a question?
You should have a proof for your representation at the new place also, so insist on it.
4th May 2018 From India, Hyderabad