Questão jurídica principal
Whether the appeal court had to apply the more lenient new law when fixing the fine.
Decisão extraída
The old law remained applicable because the new law was not more favorable for this fine; mixed application of old and new law is impermissible.
Fundamentação extraída
For contraventions, only the maximum fine changed; the imposed fine remained below both maxima, so no lex mitior advantage arose.