centralised numbering

  if the firm has get the centralised number of service tax

is the firm  required to  get the bills consecutively numbred at the same time to different branches of the firm ???

ex:  the 1 bill is made at mumbai  number is 001

and after that the 2nd bill is made at baroda then should it be  002??

or both have independent bill??

please reply

its urgent!!!!!!!!!!!!!1

its