Re: And put the button
According the Washington Post story, the limit is no more than 7 days consecutively and no more than 21 days a year. It applies to any guest, not Trump specifically, but Trump's attorney at the planning meeting did specifically agree that Trump would adhere to the restrictions.
Curiously, it throws Trump's Florida mail-in vote into question. He arguably voted illegally, since his proper domicile should be either New York or Washington D.C. For 2017 and 2018 he spent a total of 69 days in Florida, which was not enough to establish new residency when it still had a stronger presence in New York.