Beef,
Apologies for not getting back to you, i have been off line for a short while. Karl has answered your questions.
The green waistcoat should be worn by Officer's, Warrant Officer's, SNCO's and JNCO's, the only exception to this was granted to those with less than 5 years service to do from 01 Mar 06 (grandad rights).
Dont forget badges of rank are worn on both arms.
