Background:
The Mexico TIII provides an overview of how the FCTC Article 5.3 Guidelines are implemented in Mexico, linked to the protection of tobacco control policies from tobacco industry interference.

Objectives:
This research focuses on how the tobacco industry interferes in designing and implementing public health policies in Mexico.

Methods:
The index is conducted through a questionnaire. The indicators/questions are taken directly from Article 5.3 of the WHO FCTC and adapted to Mexico's situation. This questionnaire is intended to quantify the intensity, frequency, or severity of a given interference scenario occurrence.

Results:
Although there are important advances in the country, such as the approval in the Chamber of Deputies of the reform to the General Law for Tobacco Control in Mexico after 13 years, the level of industry participation has increased in the development of policies with clear examples of direct interference of representatives or allies of the tobacco industry in the Chamber of Deputies during the parliamentary process. In addition, more reform initiatives favor industry interests, with lax regulations towards electronic nicotine delivery systems and heated tobacco products. Also, Since September 2020 neither of the Chambers has updated their lists of lobbyists. CSR activities during the pandemic have also increased, mostly due to direct donations from the tobacco industry to the governments of Jalisco and Nuevo Leon. Codentify, a coding system developed by Philip Morris International is used by the Tax Administration Service for cigarette authentication. Besides, the company continues to be an ally of the social program "Jóvenes Construyendo el Futuro". The electoral legislation is not adequately protected against conflict of interest, through complete information of contributions by the tobacco industry to candidates or political parties. This is especially relevant in 2021 when the Chamber of Deputies will be renewed.