Lynch admitted stopping Bond City from winning at Ripon on 31 August 2004, an offence that carries an entry point of a 30-month worldwide ban.
But he has surprisingly been allowed to continue riding at Philadelphia Park, primarily for his brother Cathal who trains there. Lynch has ridden 98 winners this year and amassed prize money of $2.4million (£1.47m).
Officials for the Pennsylvania Racing Commission were said to be keen to know the outcome of the BHA's ruling.
Despite having admitted lesser offences, the most serious of which was passing inside information to Rodgers in exchange for the promise of rides, Williams has been banned.