The closest thing there is to a book of rules is Marie Gales Soap & Cosmetic Labeling: How to follow THE RULES AND REGS Explained in Plain English.
With the link I provided, you will go to Marie Gale’s site. I have to be honest and say that is frustrating that there is not a direct link to the page for this book, believe me I tried. Anyway, go to top menu bar to AUTHOR, click it. On the AUTHOR page, look for link to buy the book at the bottom. Supposedly, there is a link where you get Free Shipping.
The book is$24.95 with supposed Free Shipping. This is not an affiliate link. I make no money from the purchase of this book. I should though, for just having to explain how you get to the Buy Now link. Sheesh.
From the back cover:
So you just developed an awesome soap or cosmetic product. You gave it out to friends and family who raved about it and urged you to put it on the market. You checked on what that would take and that’s when you hit the wall of rules and regulations. Thud!
Does that mean you’ve hit a dead end? Absolutely not! This book explains, in plain English, how to follow product labeling rules and regulations from:
In addition, the appendixes include cosmetic color additives and their approved uses, INCI names for common ingredients, restricted and prohibited ingredients and metric conversion charts.
Whether you’re an old hand or a newcomer to the business of soap and cosmetics, you’ll find the information presented here clear and easy to understand, and Soap & Cosmetic Labeling an excellent guide through the maze of labeling regulations.