The first two documents above represent the "Regulations for Installation and Operation of Radio Stations in the Amateur Service", and the third document (the document in 4 portions above, from 1994) has more information on technical standards for equipment in the amateur service, frequency/band allocations (including acceptable repeater and simplex frequencies in the 144, 222, and 430 MHz bands), and other details that are to be read along with the 1988 documents.
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If you are not fluent in Spanish, or only need an outline of the privileges and bands available to amateur operators in Mexico, please read this summary I have prepared.