On December 1, 2018, the day he took office, President López Obrador stood in the Zócalo of Mexico City and repeated his commitment “no mentir, no robar y no traicionar al pueblo de México” (not to lie, not to steal and not to betray the people of Mexico).
In November 2020, his government made the three rules one of the principles of its Guía ética para la transformación, an ethical guide for the country.