Central States had really restrictive rules on what you could or couldn't do when I retired. I always called them and got an ok if I was going to do some silly little job. Last thing I wanted to do was screw up my pension. It used to be they only things you could do without worry was drive a school bus or get a government job. At 70 you could have any job. At a union meeting one time I asked how the Teamsters were going to know if someone was working a job they shouldn't have. The guy said "other retirees will report you---it happens all the time".