Fishing regulations

Question for the board regarding NJF regulations. I know someone who owns a farm where the SBR flows through. They own the property on both sides of the river. My question is what regulations govern fishing that stretch. Since it's private property, I'm assuming it's not governed by the same regulations as public waterways but wanted to make sure especially since opening day is coming and I believe trout waters will be closed shortly if not already. Everything caught will be released so not concerned about possession limits, just wondering if all other regulations apply or not. Thanks in advance.