When were Rookie stripes first used, and when did they become official?

The subject of rookie stripes has been a curiosity to me, as some rookie drivers have bore them on their cars and some have not. When was this practice first used and when did NASCAR make it a rule. I fully understand why they are used, as a warning to other drivers. "Be cautious, Driver in training."
updated by @gale: 12/05/16 04:04:08PM

Hi Gale! i thimkl they were first used in the 60's and phased out by the end of the decade, i am not sure so i would not take this as gospel

Hi, Paul, That's interesting. I know that the fist time I had personally seen them was on Tony Stewart's 1999 Home Depot Pontiac. Jeff Gordon didn't have them back in 1993. I had gotten hold of a Dale Jr. #31 Wrangler car, which was a model of a Busch Series car, and it had them on the back bumper. I must conclude that they are used on both Series and Cup rookie cars. I have seen them in Nationwide Series races. I guess we'll see what answers come up. nascar.com sure doesn't cover this subject. Gale