Jurists in Latin America operationalize the protective principle through the rule of in dubio pro operario, which essentially means that a judge or other adjudicator must ride in favor of the worker when confronted with hard cases.
The authors further argue that Latin American labor jurists would recognize that a canon of statutory interpretation, such as in dubio pro operario, sometimes prevails in the U.S under the common law maxim that "remedial statutes should be interpreted liberally." However, a Latin American jurist would recognize that work law deserves perhaps an even more "liberal" interpretation than other statutes because work law aims to safeguard human dignity and to equalize bargaining relationships--high-order goals which other statutes may not have.
WHEN IN DOUBT, RULE IN FAVOR OF THE WEAKER PARTY: THE RULE OF IN DUBIO PRO OPERARIO III.
In fact, Latin American jurists would recognize something akin to the rule of in dubio pro operario, a Latin American canon of statutory interpretation that posits that hard cases must be resolved in favor of workers, in the Anglo-American legal maxim that states that remedial statutes must be interpreted liberally.
Part 111 describes the rule of in dubio pro operario which follows from the principle of protection.