It is the union for workers at the Mexican, state-run oil company Pemex.
[1] The union signed its first collective bargaining agreement with Pemex in 1942.
[2] In 2001, it was discovered that funds from the union were being illegally diverted to the campaign of Francisco Labastida by the union chief Carlos Romero Deschamps in a scandal known as Pemexgate.
[1] Eleven other officials, including the union treasurer, then senator Ricardo Aldana, were implicated in the crime.
[1] The union worked on obtaining a refund of diverted funds in late 2003.