(11)To limit a possible negative impact of a client’s specific instruction on the quality of execution, resulting from the inability of an investment firm to fully apply all the elements of its order execution policy, investment firms should follow the client’s instruction only in respect of the part or aspect of the order for which the client gave a specific instruction. All other parts and aspects of the order that are not part of the specific instruction should be treated as a regular client order and should then be subject to the best execution rules.