Ornamental breeds?? Help please...

Hello

I have recently asked the council if I could keep 3 chickens in my garden. After debate I was told no! My tenancy agreement says no livestock/poultry.

I understand that other people have got round this by getting ornamental laying breeds which are not classed as poultry/livestock.

Does anyone know anything about this? Why they are not classed as poultry and which breeds they are. Any info that could help my case would be very much appreciated!!

THANK YOU!!