Thank you very much.
I just received an answer from UKBA saying " no time limit set on child" as well.

Professional!

Dear all, Thanks for helping first. My kid(<2 years old) has got her Tier 1 dependant visa Out of Country on 15th July till 2013. We planned to take her but something happened that we have to postpone her coming time. Does anyone know whether there is a limit of period for her to come to UK?For exam...