This summary is not the rule. The rule text controls.
Here's what this rule means in everyday terms:
If police have a warrant and go to a house, building, vehicle, or other structure to carry it out, they first have to announce who they are and why they're there. If the people inside don't let them in after that announcement, officers are allowed to break down doors or windows to get inside. This includes breaking open things inside the location too, like locked doors or containers, if needed to carry out the warrant.
The key point is that officers can't just break in right away. They have to knock, identify themselves as law enforcement, and explain their purpose first. Only after being refused entry can they use force to get inside. This rule balances giving police the power they need to do their job with protecting people's right to know who is at their door before officers force their way in.
