Using a unique ``++KLIST++`` to access files ensures that the correct key is used at all times and creates a standard method of accessing the data throughout the code, simplifying maintenance and improving readability.
This rule flags non-compliant instances of ``++CHAIN++``, ``++DELETE++``, ``++READE++``, ``++READPE++``, ``++SETGT++``, and ``++SETLL++`` operations.