"[DOL] is proposing ... that covered service providers furnish a guide along with the initial disclosures required by the rule, if the disclosures are contained in multiple or lengthy documents. The Department believes that plan fiduciaries, especially in the case of small plans, need a tool to effectively make use of the required disclosures. The guide being proposed in this document provides clarity and specificity, while avoiding the uncertainty and burdens that some commenters argued may accompany construction of a 'summary' of existing documents. The Department believes that a required summary without some guide to the underlying disclosures themselves, could become the primary document on which some responsible plan fiduciaries rely, which is not the Department's intention.... To avoid unnecessary cost to covered service providers, the proposal also allows for the fact that, in some cases, covered service providers may already furnish the required disclosures in a concise, single document. If that is the case, then the covered service provider will not be required to provide a separate guide to the disclosures."