Sorry, if you fall under the proposed Category 4 and conditions of Category 3, you will lose your rights.
The way I read this is to say I could not expand any further or could not put in new if I do not already have chickens or "livestock". I am in a neighborhood so am certainly zoned residential, but what you are saying is that if this goes through I will lose any right that I currently have for keeping any amount of chickens on my own property, right?