Article D48-36 of the French Code of Criminal Procedure
In the event of wilful failure to pay the sum of money corresponding to a pecuniary penalty imposed as a sentence for acts which would constitute under French law a felony or misdemeanour punishable by a custodial sentence, the sentence enforcement judge may, if the acts are punishable by a custodial sentence in the issuing State, order, under the conditions provided for in the articles 750 to 762, a judicial…