Extreme age PLA

It seems like you're asking about "extreme age" in the context of "PLA," but it's a bit unclear what you mean by "PLA." PLA could refer to various things, including "People's Liberation Army" in China, "Public Library Association," or even "Polylactic Acid" in materials science, among others. Could you please clarify what you mean by "PLA" and how it relates to "extreme age"? Are you referring to populations with extreme ages (e.g., centenarians), specific policies or military considerations regarding age, or something else entirely?