Veracruz municipios are sorted into regional associations by state decisions.
Except for statistical analysis, I have yet to see any political benefits arising from the official regions.
Until 2005 Los Tuxtlas were split among 2 regions, Sotavento and Las Selvas.
As of now the Tuxtlas regions are Los Tuxtlas and Las Olmecas.
Political districting also gerrymandered Los Tuxtlas.
At present
federal districts
state districts.
Government of Los Tuxtlas
Regional Government