(a) In general.
         For rules relating to the extension of period of collection when a tax return preparer who prepared a return or claim for refund for tax under chapter 43 of subtitle D of the Internal Revenue Code pays 15 percent of a penalty for understatement of taxpayer's liability, and procedural matters relating to the investigation, assessment and collection of the penalties under  section 6694(a) and (b), the rules under  § 1.6694-4 of this chapter will apply.
     
    
        
        (b) Effective/applicability date.
         This section is applicable to returns and claims for refund filed, and advice provided, after December 31, 2008.
     
    
        
            Code of Federal Regulations
        
        [T.D. 9436, 73 FR 78459, Dec. 22, 2008]