PETITION NO. 764A - T-Mobile Northeast LLC (T-Mobile) request to amend its declaratory ruling that no Certificate of Environmental Compatibility and Public Need is required to relocate an existing T-Mobile facility attached to an Eversource transmission line structure (#1814) onto an approved replacement electric transmission line structure (#1814) within the existing Eversource right-of-way located at 437 Hobart Street, Southington, Connecticut.