The phrase "guiding rule" refers to a principle or a set of instructions that provide direction or guidance in decision-making or behavior. It acts as a helpful tool to follow when making choices or navigating through situations. Full definition
Fortunately, common sense doesn't guide the rules of quantum physics, as evidenced by a brief 1993 paper with a mouthful of a title: «Teleporting an Unknown Quantum State Via Dual Classical and Einstein - Podolsky - Rosen Channels.» (discovermagazine.com)
In his statement, Obama outlined four guiding rules in his proposal. (entrepreneur.com)