ORIGINAL CONCESSION (Oct. 20, 1987). Concession to construct the road section connecting the regions of Acatlan, Usmajac, Guzman City, Atenquique, San Marcos, Tonila and Colima Airport located at the 100+000 km, 120+000 km, 140+000 km, 157+000 km, 163+000 km and the 175+000 km respectively, as the concession includes the operation and exploitation of the Acatlan-Colima Airport section of the Guadalajara-Colima toll highway. The term of the concession is 20 years.
FIRST MODIFICATION (Oct. 26, 1988). Colima-Manzanillo from the 44+100 km to the 60+000 km, which includes the Armeria Bridge from the 79+691 km to the 87-326 km, including the Tepalcates Bridge.
(May 9, 1991). The extension of the concession is canceled as of Aug. 1, 1991 (FIRST ADDENDUM).
SECOND MODIFICATION (Nov. 14, 1994). The treatment of the assets subject to reversion in favor of the Nation is specified once the concession concludes.
THIRD MODIFICATION (May 11, 1999). Extension of the term of the concession to 30 years from Oct. 20, 1987.
FOURTH MODIFICATION (Dec. 9, 2010). Build, operate, exploit, conserve, and maintain the Guadalajara-Colima highway from the 0+000 km Acatlan in Jalisco, to the 148+000 km El Trapichein Colima, including the right-of-way, works, constructions and other goods and accessories. Expansion and rehabilitation from 2 to 4 traffic lanes from the 69+100 km to the 127+200 km of the Guadalajara-Colima highway. Construction projects of the bridges parallel to the ""El Nuevo"" and ""El Tapon"" bridges located at the 108+657 km and at the 119+078 km of the concessioned road respectively; and "La Cuesta" and "Cuatro Caminos" junctions at the 68+745 km and at the 108+293 km respectively. Extension of the term of validity for up to 30 additional years, counted as of Oct. 20, 2017.
FIFTH MODIFICATION (June 12, 2014). Expansion and modernization from 4 to 6 lanes 134+000 to km 148+000, including induced, complementary and additional works, as well as the release of the right of way and its ancillary services.