I recall seeing that in the old reg' s myself, but as of last year I started using them. I looked high & low through the reg' s and didn' t find anything saying you can or can' t use them. I got 3 pair from a motorola rep buddy and plan on using them this year, if I get in $hit[], I' ll just ask them to show me where it says, I can' t use them...I absolutely love them in the field, even helped a lost buddy last year. JDinAB