Article 127 Federal Criminal Code

The prison sentence of five to twenty years and a fine of up to fifty thousand pesos shall be applied to the foreigner who, in time of peace, with the object of guiding a possible invasion of the national territory or of altering the internal peace, holds relations or intelligence with a foreign person, group or government or gives it instructions, information or advice.

The same penalty shall be imposed on the foreigner who, in time of peace, provides, without authorization to a foreign person, group or government, documents, instructions, or any data on establishments or on possible military activities.

The prison sentence of five to forty years and a fine of up to fifty thousand pesos shall be applied to the foreigner who, once war is declared or hostilities against Mexico are broken, holds relations or intelligence with the enemy or provides it with information, instructions or documents or any aid that in any form harms or may harm the Mexican Nation.