Which of the following is NOT a rule regarding Multiple Dependent Claims (MPC)?

The correct choice identifies a rule that is not applicable to Multiple Dependent Claims (MPC) as outlined in the Manual of Patent Examining Procedure (MPEP). In particular, one of the unique characteristics of MPCs is that they are allowed to depend on other MPCs, which means an MPC can incorporate the claims of other MPCs. This structure provides flexibility in how claims can build upon one another, enhancing the ability to define relationships between various dependent claims in the patent application.

Each of the other statements describes valid rules regarding MPCs. For instance, MPCs must utilize “or” to denote alternatives when making claims—as this clarifies the options being included in the claim scope. Additionally, the notion that a MPC must be independent if it claims from another MPC engages with the structural integrity of claims and their dependencies, ensuring compliance with patent rules governing clarity and specificity in claims. Therefore, the assertion that an MPC cannot depend on other MPCs is not aligned with established practice.