I work in New England (Local 653) . It used to be 30 and out meaning however old you were when you had 30 years you could retire. A few years ago they changed it to 57 . My 30 would be when im 55 (including 4 years inside part time 1/2 year credit per year) but no the change it adds 2 years on to my sentence.
We have guys that started driving at 21 and they would have been 51 when they retire . Now they have to work an additional 6 years.