There are not photography laws, there are laws that may affect you as a citizen (with photography as a hobby).or as a small business owner (of a photography business), etc.
You may be allowed to take photos someplace, but there's a difference between taking the photos and how you use them.
The guidelines for what should be done in how you use your photos are that for editorial use like in a newspaper or magazine you usually wouldn't need releases signed - but the media outlet may request one, especially if you're a photographer they haven't worked with before.
Usually the guideline for retail use where you're making money selling photos (on T shirts, mugs etc.) is that you'd need to get releases signed; usually for a fine art print you wouldn't (the print being intended for the buyer's personal use).
For commercial use, which means for use in advertising or promotions/marketing by a client, usually you'd need releases signed.
You can get information from professional photographer organizations like
American Society of Media Photographers or PPA on model and property releases, licensing, contracts, guidelines for usage, etc.