Multiple elements in a [LHS] of all Rules are subject to the logical modifier "AND". This means that all elements of the list that comprises the [LHS] must be selected before the Rule will be executed.

For example, consider this Rule, stated in English:
"When the 4X4 drive train AND the Tough Tread Tires are selected, the Tow Package is included."

If only one of the [LHS] elements is selected during a product configuration session, the Rule is not triggered and theTow Package is not added to the product configuration.

Multiple Parts within the [RHS] are subject to additional logical modifiers.