UPDATED 09/25/2019: With regards to ivory and animal parts as commonly used in knives, the following summary is in reference to “modern” knives and their accouterments (a sheath, display stand, etc.). 

There are some “antique” exceptions for knives in excess of 100 years old for some of these bans. There are also some other narrow exceptions (“restrictions” noted below) to these bans. These antique exemptions and restrictions can be reviewed at the “State Law” links provided below.

… Continue reading State Ivory & Animal Parts Ban Summary