These institutions functioned as appellate courts in the Spanish colonial system. They also advised the viceroys, holding significant administrative and political power. These bodies were primarily staffed by lawyers sent directly from Spain to ensure loyalty to the crown. Their decisions impacted a wide array of colonial life, ranging from property disputes to enforcing royal decrees.
The establishment of these judicial councils served to limit the power of individual viceroys and other colonial officials, contributing to a system of checks and balances, albeit one firmly under the control of the Spanish monarchy. They played a critical role in implementing and interpreting Spanish law in the colonies, shaping the legal landscape and influencing social hierarchies for centuries. Their presence was a tangible representation of royal authority and facilitated the consolidation of colonial rule.