It sure does exist:
http://www.lib.umich.edu/govdocs/jfkeo/eo/11110.htmExecutive Order 11110
AMENDMENT OF EXECUTIVE ORDER NO. 10289
AS AMENDED, RELATING TO THE PERFORMANCE OF
CERTAIN FUNCTIONS AFFECTING THE DEPARTMENT OF THE TREASURY
By virtue of the authority vested in me by section 301 of title 3 of the United States Code, it is ordered as follows:
SECTION 1. Executive Order No. 10289 of September 19, 1951, as amended, is hereby further amended --
(a) By adding at the end of paragraph 1 thereof the following subparagraph (j):
"(j) The authority vested in the President by paragraph (b) of section 43 of the Act of May 12, 1933, as amended (31 U.S.C. 821 (b)), to issue silver certificates against any silver bullion, silver, or standard silver dollars in the Treasury not then held for redemption of any outstanding silver certificates, to prescribe the denominations of such silver certificates, and to coin standard silver dollars and subsidiary silver currency for their redemption," and
(b) By revoking subparagraphs (b) and (c) of paragraph 2 thereof.
SEC. 2. The amendment made by this Order shall not affect any act done, or any right accruing or accrued or any suit or proceeding had or commenced in any civil or criminal cause prior to the date of this Order but all such liabilities shall continue and may be enforced as if said amendments had not been made.
JOHN F. KENNEDY
THE WHITE HOUSE,
June 4, 1963.
Now, for a further explanation of just what this means, which isn't really all that much:
http://www.realityzone.com/creatup.htmlI don't know much more about the history of all this, but I do know that bimetallism, or any other dual money system, is dangerous. Fortunately, we were once "crucified on a cross of gold" and didn't get much silver money back then. Also fortunate is that silver didn't wipe out Federal Reserve notes. A reading of Gresham's Law will explain it all. Some background in macroeconomics and how the money supply works helps, too. Alexander Hamilton, way back then, knew about the problems of contracting money supplies backed by bullion.
Not that there aren't problems with money backed by debt, of course.