How long is an arrest warrant valid according to law enforcement standards?

An arrest warrant is considered valid until it is executed, meaning that it remains active and enforceable until law enforcement officials carry out the arrest specified in the warrant. This is crucial because it ensures that law enforcement can apprehend individuals who may evade capture at a later time. The ongoing validity allows for flexibility in law enforcement capabilities and encourages diligent efforts to locate and apprehend suspects at any time, regardless of when the warrant was issued. The other options suggest finite durations which do not reflect the nature of how arrest warrants function legally.