Limited scrutiny notice u/s 143(2)/ 142(1)

There are no such rulings and in fact there cannot be any such rulings, for the simple reason that the AO is not doing scrutiny proceedings in regard to AY 2014-15, but only seeks details of bank account for AY 2014-15 while doing scrutiny assessment of AY 2015-16.  

Ok...so that means he can ask for the bank statements for as many preceeding years ? If it is so than what's the relevance of the time limit for issuing notice u/s 143(2) for any relavant AY. ?

The time limit is for issuing notice for undertaking scrutiny assessment of a particular AY - not to restrict the information which can be sought.  For example, if the time limit to conduct scrutiny assessment for a particular AY gets exceeded, he may not be able to even issue the notice, forget about conducting scrutiny assessment.

Ok sir, i agree that time limit is for issue of notice. And which means that if he has not served notice wthin that time limit specified u/143(2) then he cannot conduct the scrutiny assessment for that FY year. Hope until here you also agree.

Now after issue of notice he asks for information u/s 142(1), can he ask for any no. of previous years ?