advocate

"their's" isn't.

Methinks you need to provide more context, WB.

I advocate that New York should have the authority to approve (their) entry.

[If New York has that authority then your advocacy is unnecessary.]

New York has the authority to approve entry.

Thank you JTT~

But consider this

-- I would advocate New York’s authority to approve their entry right.

The main point is whether advocate sb to do sth is possible.

You can advocate something, e.g. I advocate Scottish independence, stricter laws on mobile phone use while driving, harsher penalties for fraud in public office, etc, but it is by no means clear what "New York’s authority to approve their entry right" means, if anything.

That might work, WB. It certainly fits the definition but I'm not sure
it fits usage.

I'd opt for a 'for' in there.

I would advocate for ... .

Thank you JTT.

But to Cont, your answer means ADVOCATE SB TO DO STH works/does not work?

He advocated she do sth. POSSIBLY

He advocated she to do sth. NO

Thanks~ but I mean:

He advocated HER/HIM (not SHE) to do sth.