Within the Leather/BDSM culture, there is a tradition that dates back to at least 1965. While it took different forms in different parts of the country, there has been some form of documentation found to support the existence of this tradition in almost every major city where a Leather sub-culture existed.
The tradition basically states that, with the exception of boots and belts, you are not permitted to wear leather unless it has been given to you by someone more experienced. The leather is usually given after you have “earned” it through some sort of milestone in your development, such as a particularly challenging scene or the mastery of a particular skill.