I didnt see where it said that existing toilets had to be changed?
Here’s the news again :
Under a law passed by the City Council today, new toilets will have to be high water efficient or “dual-flush,” which allow users to choose between a high pressure flush for solid waste, and a low-pressure flush for liquid.
This will only affect NEW BUILDINGS and NEW HOUSES built in NYC.
In the thread title, the part in parentheses is confusing.
Pull a permit, upgrade the works.