Final answer:
Business Rules are typically enforced in the business logic layer of an application or within the database system. They ensure data integrity and adherence to business standards.
Step-by-step explanation:
The question asks where Business Rules reside and notes that redundant business rules are also enforced in the same location. In the context of Computers and Technology, especially in software development and database management, Business Rules typically reside in an application's business logic layer or within the database system itself, as constraints or triggers.
For instance, if a business rule dictates that the email addresses in a customer database must be unique, the rule can be implemented as a unique constraint in the database. This would prevent the insertion of a new customer record with an email address that already exists in the database. Additionally, the application's business logic may check for the uniqueness of an email address before attempting to create a new record, thus enforcing the rule both at the database and application level. This ensures data integrity and adherence to business standards.