Congress did not state in the new sex offender registration bar that state failure to register offenses that are analogous (or coextensive) with the federal offense also trigger deportation or other adverse immigration consequences. It specified that only convictions "under 18 USC 2250" would do so. Compare the aggravated felony definition, that expressly states analogous state convictions are included in the aggravated felony definition. The controlled substances deportation ground explicitly includes violations of "any law or regulation of a State . . . ." INA 237(a)(2)(B)(i). The firearms ground expressly includes people "convicted under any law . . . ." INA 237(a)(2)(C). It is impossible to conclude that any state convictions occur "under" 18 USC 2250. Since Congress did not specify state convictions under state laws analogous to 18 USC 2250, they are simply not included. Many judicial decisions hold that if a conviction is not listed as triggering deportation, it does not do so.