Re-rectification of itr possible?

if you want any rectification in ITR submitted by you then you hav to revise ur ITR in prescribed time. it can be revised only when it has been filed within due date of filing.
 

i am talking about re-rectification of application u/s 154..

only income tax authority can rectify the mistake u/s 116, on its own motion or on an application made by the asesse.

Yes It can be rectified for any number of time....