725.50—EPA review.
        
        (a) MCANs.
         The review period specified in  section 5(a) of the Act for MCANs runs for 90 days from the date the Document Control Officer receives a complete submission, or the date EPA determines the submission is complete under  § 725.33, unless the Agency extends the review period under  section 5(c) of the Act and  § 725.56.
    
    
        
        (b) Exemption requests.
         The review period starts on the date the Document Control Officer receives a complete exemption request, or the date EPA determines the request is complete under  § 725.33, unless the Agency extends the review period under  § 725.56. The review periods for exemption requests run as follows: