Just an FYI, closing up vents in an hvac can actually cause problems. It puts more strain on the fan unit, which can cause it to burn up quicker. The unit is designed to move a certain amount of air, if you restrict that air, pressure builds up in the system.
A couple closed over an entire system is fine, but closing all but one room would definitely cause problems.
It's been the fucking wild west here in Texas due to new laws being pushed out then shot down so quickly, no one can keep track. Even the ones passed are written so badly, they can't be interpreted correctly. The following is from an article from ProPublica
Although US abortion bans – which more than a dozen states have enacted in the two years since the supreme court overturned Roe v Wade – technically permit the procedure in medical emergencies, doctors across the country have said that the laws are worded so vaguely that they don’t know when they can legally intervene.
This has been repeated ad nauseum by doctors on local outlets. It's meant to be vague and confusing.