Questão jurídica principal
Whether Art. 57(1)(a) LTV applies to a passenger traveling without a valid ticket on a line where no self-validation duty existed.
Decisão extraída
No. The provision covers only travel on a segment where the passenger had to validate the ticket himself; that condition was absent here.
Fundamentação extraída
The wording, system, and legislative history distinguish self-validation of one's own ticket from other tariff or execution-rule violations. Extending the penal norm beyond that wording would create a new punishable offense contrary to nulla poena sine lege.