Parliamentary sovereignty has significant impacts, as it grants the legislative body ultimate authority over law-making free from judicial review or executive interference. This principle allows parliaments to pass and repeal laws without external constraints, promoting democratic accountability. However, it also raises concerns over potential abuse of power, as unchecked authority can lead to authoritarianism. The doctrine impacts how laws are interpreted and applied, influencing both political stability and the relationship between the governing bodies and the populace, which can vary widely across different political systems.