When did the FAA start requiring these endorsements?

I think the Hi-Perf endorsement was around '97 or so, but don't remember if the Complex was the same time or if it was around before - I've heard old guys say they had complex sign offs years before and others say it was around the same time as the Hi-Perf one.

The reason I ask is I don't recall this when I was doing most of my ASEL flying in the early '80s, but then again, I wasn't flying Hi-Perf or Complex. I did fly my dad's Mooney, but always with him and never as PIC.