The minimum standards of character that are to be prescribed under this section shall ensure that none of the individuals appointed to positions described in subsection (a) have been found guilty of, or entered a plea of nolo contendere or guilty to, any felonious offense, or any of two or more misdemeanor offenses, under Federal, State, or tribal law involving crimes of violence; sexual assault, molestation, exploitation, contact or prostitution; crimes against persons; or offenses committed against children.