Dirt, I have everything you have quoted and then some. The majority of my definitions come from Black's Law Dictionary, 11th Edition, a couple come from Merriam-Webster's Collegiate Dictionary, 11th Edition, and a couple come from SCOTUS rulings other sources.
Are you familiar with IRC (Title 26 USCA, Sec. 183)? You can find it in the IRS Codes or you can look up in Black's Law Dictionary under the word "Hobby Loss."
Since Black's Law Dictionary, 11th Ed., did not have a definition for the word, "avocation," I looked it up in Merriam-Webster's Collegiate Dictionary, 11th Ed., An "avocation" is: "(2) Customary employment: Vocation (3) A subordinate occupation pursued in addition to one's vocation, especially for enjoyment: Hobby."
In other words, commercial fur harvesting can be engaged in as a second, third, fourth, etcetera, part-time occupation (job) as a profit producing income stream and still be considered a part of one's livelihood.
Black' Law Dictionary, 11th Ed., defines a "livelihood" as "A means of supporting one's existence, especially financially.
The website
https://lawinsider.com defines "Livelihood" as, " The full range of of means that individuals, families and communities utilize to make a living such as wage-based income, agriculture, foraging, other natural resource-based livelihoods, petty trade and bartering."
Dirt and Midlander, it has been a hoot discussing this with the two of you. I am just trying to educate everybody on their constitutional rights and how they relate to commercial fur harvesting. If I have stepped on some toes, tough, deal with it. I have a treatise to finish working on. I'll come back when I am finished with the final product.