
From the U.S. Code Online via GPO Access
[wais.access.gpo.gov]
[Laws in effect as of January 23, 2000]
[Document not affected by Public Laws enacted between
  January 23, 2000 and December 4, 2001]
[CITE: 39USC3207]

 
                        TITLE 39--POSTAL SERVICE
 
                          PART IV--MAIL MATTER
 
                  CHAPTER 32--PENALTY AND FRANKED MAIL
 
Sec. 3207. Limit of weight of penalty mail; postage on 
        overweight matter
        
    (a) Penalty mail is restricted to articles not in excess of the 
weight and size prescribed for that class of mail receiving high 
priority in handling and delivery, except--
        (1) stamped paper and supplies sold or used by the Postal 
    Service; and
        (2) books and documents published or circulated by order of 
    Congress when mailed by the Superintendent of Documents.

    (b) A penalty mail article which is--
        (1) over 4 pounds in weight;
        (2) not in excess of the weight and size prescribed for mail 
    matter; and
        (3) otherwise mailable;

is mailable at rates for that class of mail entitled to the lowest 
priority in handling and delivery, even though it may include written 
matter and may be sealed.

(Pub. L. 91-375, Aug. 12, 1970, 84 Stat. 753.)
