"Cualquier acto unilateral y extrajudicial por parte de los cuerpos de seguridad contraviene las normas elementales de la ley."

Simplified Meaning:

When police or any law enforcement group takes action on their own, without going through the proper legal process, they are breaking basic laws. Imagine if a police officer decides to arrest someone without any evidence or trial, simply because they think that person looks suspicious. This kind of behavior isn't just unfair; it goes against the rules that are meant to protect everyone’s rights. For example, in history, during times of dictatorship, some governments would arrest people without a reason, or they would punish them without a fair trial. In a fair society, everyone should have the right to a fair process, like going to court and having a chance to defend themselves. This way, laws are followed properly, and everyone can be treated justly. To apply this in everyday life, if you ever feel that someone in power is not following proper procedures, it's important to speak up or seek help. Just as you would expect rules to be fairly enforced in a game or at school, the same should happen in society. Everyone, no matter who they are, should follow the rules to keep things fair and just.