As economic activity grew in the fifties and sixties, the public demand for low denomination currency grew, increasing the Treasury's need for silver to back additional certificate issues and to mint new coins (dimes, quarters, half-dollars). However, during the late fifties the price of silver began to rise and reached the point that the market value of the silver contained in the coins and backing the certificates was greater than the face value of the money itself.2
To conserve the Treasury's silver needs, the Silver Purchase Act and related measures were repealed by Congress in 1963 with Public Law 88-36. Following the repeal, only the President could authorize new silver certificate issues, and no longer the Treasury Secretary. The law, signed by Kennedy himself, also permits the Federal Reserve to issue small denomination bills to replace the outgoing silver certificates (prior to the act, the Fed could only issue Federal Reserve Notes in larger denominations). The Treasury's shrinking silver stock could then be used to mint coins only and not have to back currency. The repeal left only the President with the authority to issue silver certificates, however it did permit him to delegate this authority. E.O. 11,110 does this by transferring the authority from the President to the Treasury Secretary.2
E.O. 11,110 did not create authority to issue new silver certificates, it only affected who could give the order. The purpose of the order was to facilitate the reduction of certificates in circulation, not to increase them. In October 1964 the Treasury ceased issuing them entirely. The Coinage Act of 1965 (PL 89-81) ended the practice of using silver in most U.S. coins, and in 1968 Congress ended the redeemability of silver certificates (PL 90-29). E.O. 11,110 was never reversed by President Johnson and remained on the books until 1987 when there was a general cleaning-up of executive orders (E.O. 12,608, 9/9/87). However, by this time the remaining legislative authority behind E.O. 11,110 had been repealed by Congress with PL 97-258 in 1982.2
In summary, E.O. 11,110 did not create new authority to issue additional silver certificates. In fact, its intention was to ease the process for their removal so that small denomination Federal Reserve Notes could replace them in accordance with a law Kennedy himself signed. If Kennedy had really sought to reduce Federal Reserve power, then why did he sign a bill that gave the Fed still more power?