"'When efforts to resolve the disclosure failure with their service provider are ineffective, plan sponsors will be able to take advantage of an easy-to-use, online tool that will guide them through the information that must be submitted to the department and provide immediate confirmation that their notice has been received. Of course, plan sponsors who wish to submit a paper notice may continue to do so,' [Assistant Secretary of Labor for EBSA Phyllis C. Borzi] explained[.]"