He didnt say how the law could be changed, just that it could.
Starmer would have to remove sex as a protected characteristic, or change it to mean a newly defined gender.
Who gives birth, goes through the menopause, is subject to misogyny? How are these people protected if they dont have a name. He talks about being gay, does he really want the definition to be based on gender not sex?
Zack couldnt reword the law if his life depended on it.