Where the 4th amendment applies the exceptions to the general rule against warrant-less searches and seizures of what is found by police and customs officials are what?

The Fourth Amendment protects against unreasonable searches and seizures, but there are several exceptions to the warrant requirement. These include exigent circumstances, where immediate action is necessary; consent, where an individual gives permission for a search; search incident to a lawful arrest; and the plain view doctrine, where officers can seize evidence that is clearly visible without a warrant. Additionally, customs officials have broader authority to search individuals and their belongings at borders without a warrant due to national security interests.