The Mexican Official Standard PROY-NOM-220-SCFI-2017 established new requirements for equipment that can block mobile phone signals, radio communications or transmission of images and other data that can be used within social rehabilitation centers, penitentiary establishments or juvenile detention centers, federal or federative entities. Ensuring that they do not cause harmful inferences between operating equipment. Once it is published in the Official Journal of the Federation as a final rule, it enters into force on the day following its publication 60 calendar days.