                        TITLE 19--CUSTOMS DUTIES
 
                   CHAPTER 7--TRADE EXPANSION PROGRAM
 
                     SUBCHAPTER II--TRADE AGREEMENTS
 
                        Part I--General Authority
 
Sec. 1821. Basic authority for trade agreements


(a) Determination by President; trade agreements; modification or 
        continuance of existing duties

    Whenever the president determines that any existing duties or other 
import restrictions of any foreign country or the United States are 
unduly burdening and restricting the foreign trade of the United States 
and that any of the purposes stated in section 1801 of this title will 
be promoted thereby, the President may--
        (1) after June 30, 1962, and before July 1, 1967, enter into 
    trade agreements with foreign countries or instrumentalities 
    thereof; and
        (2) proclaim such modification or continuance of any existing 
    duty or other import restriction, such continuance of existing duty-
    free or excise treatment, or such additional import restrictions, as 
    he determines to be required or appropriate to carry out any such 
    trade agreement.

(b) Restrictions on decrease or increase in rate of duty

    Except as otherwise provided in this subchapter, no proclamation 
pursuant to subsection (a) of this section shall be made--
        (1) decreasing any rate of duty to a rate below 50 percent of 
    the rate existing on July 1, 1962; or
        (2) increasing any rate of duty to (or imposing) a rate more 
    than 50 percent above the rate existing on July 1, 1934.

(Pub. L. 87-794, title II, Sec. 201, Oct. 11, 1962, 76 Stat. 872.)


              Wood-Wind and Parts of Wood-Wind Instruments

    Pub. L. 90-234, Sec. 2(b)(2), Dec. 30, 1967, 81 Stat. 752, provided 
that: ``The amendments made by the first section of this Act, insofar as 
such amendments relate to items 725.24 and 726.70 of the Tariff 
Schedules of the United States, shall not affect the authority of the 
President contained in section 201(a)(2) of the Trade Expansion Act of 
1962 [subsec. (a)(2) of this section].''


              Dicyandiamide and Limestone: Duty-Free Entry

    Duty-free treatment pursuant to this chapter of dicyandiamide in 
item 425.40 and limestone when imported for use in manufacture of cement 
in item 513.34 of the Tariff Schedules of the United States, by 
provision for non-application of subsec. (b)(1) of this section, see 
section 1823 of this title.

                  Section Referred to in Other Sections

    This section is referred to in sections 1823, 1862, 1981, 2135, 3105 
of this title.
