After , no person shall have authority to permit citizens of the American Republics to receive instruction at the United States Military Academy under the provisions of . Any person who is receiving instruction at the United States Military Academy on , under authority of , may, in the discretion of the President, be permitted to continue to receive such instruction and, if so permitted, shall thereafter be deemed to be receiving instruction under the provisions of .section 221 of this titlesection 221 of this titlesection 347 of title 10June 26, 19461946-06-26June 26, 19461946-06-26