D.__May establish appropriate technical, procedural or any other standards relating to multiline telephone systems, telecommunications carrier interconnectivity, databases, dialing instructions, signaling or other matters necessary or appropriate to carry out the purposes of this section.

2.__Rules.__Rules adopted pursuant to this section are major substantive rules as defined in Title 5, chapter 375, subchapter 2-A.__The bureau may not provisionally adopt any rule under this section that has not been approved by the Public Utilities Commission.