In 1996 , the Comisión de Concordia y Pacificación ( COCOPA ) presented a proposal of constitutional reform ( the Cocopa law ) based on the San Andrés Accords to the EZLN and the federal government . As a gesture of political will to solve the conflict peacefully the Zedillo government signed this proposal , thereby recognizing the indigenous culture and its right to land and autonomy ( in concordance with International Labour Organization convention 169 , signed by Mexico in 1990 )
International Labour Organization convention 169
Indigenous and Tribal Peoples Convention, 1989
Chiapas conflict