The Block 6 certification for the Form 471 with an original signature by the authorized person. All attachments for the Form 471 - Item 21. The SLD recently published a services update. A couple of service categories were expanded, others refined further. The new list also clarifies that modems are eligible when installed in eligible equipment such as Routers, and the use of Cable modems to support Internet Access from Cable companies.
Modems remain ineligible when attached to ineligible equipment such as PC's.
Please take some time to go over the eligible services list PDF attachment here. As always, if there are any questions, please don't hesitate to e-mail.