; (iii) the first witness has been sworn in a prosecution for the covered offense tried without a jury before the date of enactment of this section; or (iv) a sentence has been imposed following a plea of guilty or nolo contendere in a prosecution for the covered offense before the date of enactment of this section. (f) Subsequently enacted laws No law enacted after the date of enactment of this section shall be construed to repeal, modify the text or effect of, or supersede in whole or in part this section, unless such law specifically refers to this section and explicitly repeals, modifies the text or effect of, or supersedes in whole or in part this section. . (b) Technical and conforming amendment The table of sections for chapter 1 of title 18, United States Code, is amended by adding at the end the following: 28. State of mind when not otherwise specifically provided. .