1999 UNAM strike council of the university, which includes faculty and students, modified the proposal to make the tuition increase voluntary. Barnés declared that the conscience of each student would dictate who would pay increased tuition and who would not. Strikers grew increasingly belligerent and had violent altercations with students who were still attempting to enter the campus to try to resume classes. Meanwhile, UNAM issued multiple warrants against strikers who were accused of stealing computers, vehicles and earthquake monitoring equipment. The strikers took advantage of the situation to resist additional graduation requirements such as tougher examinations and time limits for graduation. When
Mexican art be expressed in a mural in support of student movement's protests; the work became known as the "Mural Efímero" (or "Ephemeral Mural")" at UNAM". The third Independent Salon was staged in 1970. In 1976 "Fernando Gambao spearheads the organization of an exposition of abstract art entitled "El Geometrismo Mexicano Una Tendencia Actual"". "In an attempt to reassess ... post-1968 Mexican art, the Museum of Science and Art at UNAM" organized in 2007, the exhibition "La Era de la Discrepancia. Arte y cultura visual en México 1968-1997" In 1990 the exhibition "Mexico: Esplendor de Treinta Siglos", started its world tour at