CA
                
                   82 Points
                   Joined December 2007
                
               
			  
			  
             
            
             Section 206AA  'Uses the Term Notwithstanding Anything Contained in "Chapter XVIIB)",, The recovery be at 20% if PAN is not available.
The point here is TDS Provisions are in Chapter XVIIB and TCS Provisions are in Chapter XVIIBB.
Typing this is Only Chapter like this, in Income tax Act.
Other Chapters of the act are Distinctive say XIX has sub chapter but all distinctive Like XIX-A ,, XIX-B
But in TCS Case "had if" the TCS chapter is a distinctive chapter then it serial should ideally be XVIIC , which should have the serial number after XVIIB,, Then TCS would have been a seperate chapter,, But in Income Tax Act,1961-"No New Chapter" number is allotted to TCS but just an extension after TDS. That is the reason ,the assessing office applied the provisions of Section 206AA even to TCS also.
Refer section 206AA on the link: https://www.exploreincometax.com/Indian-Income-tax-Act-1961/Section-206AA