Mexico Copyright

Life +100 years (effective 23 July 2003 non-retroactively)

[Life + 75 years (before the law change on 23 July 2003, applicable for deaths before 23 July 1928)]

[Life + 50 years (before the law change on 1 January 1994, applicable for deaths before 1 January 1944)]

Sound recording
"The protection referred to in this Chapter shall be for 50 years following the first fixation of the sounds on the phonogram."

http://www.wipo.int/wipolex/en/details.jsp?id=3079

The duration of performer’s rights protection has been extended from forty-five years to seventy-five years. The duration of protection for producers of phonograms is extended from fifty years from the date of fixation of the sounds to seventy-five years and the term of protection for reproduction of a radio broadcast is extended form twenty-five years to fifty years.