The present Brazilian regulation is not precise whether the alternate fuel could or could not be used to proceed to the original destination without compromising the emergency fuel, once exact specific requirements are met. As a result of unclear directrices, each major airline in Brazil comprehends and applies the ICAO recommendation in its way. Such a non-standardized interpretation of the current regulation certainly compromises both the airline industry's safety and efficiency in the country. Therefore, this research proposes a more comprehensive and clear text for the Brazilian rules, encouraging airlines to adhere to what the ICAO recommendation preconizes widely.