Until recently, NTFS permissions have followed these inheritance rules:
One of the NTFS inheritance rules changed in Windows 7, Windows Server 2008, and Windows Vista. Now if you move a file or folder, it will inherit the new location's NTFS permissions, even if the new location is on the same disk drive. This is a radical shift that you need to take into account when you're moving files. You can find a reference to this change in the Notes section in the Microsoft article "Inherited permissions are not automatically updated when you move folders".