US: The term "joint costs" refers to costs incurred when two or more outputs are produced in fixed proportion by the same production process (i.e., when one product is produced, a second product is generated by the same production process at no additional cost). (CC Docket 96-98)
US: Rules prescribed by Part 36 of the FCC's Code of Federal Regulations by which incumbent LECs divide their regulated expenses and investment between intra-state and inter-state jurisdictions. The jurisdictional separations process divides between the state and federal jurisdictions the costs of those portions of the incumbent local exchange carriers' (ILECs) telephone plant that are used for both inter-state and intra-state services. Each jurisdiction then specifies how rate-regulated ILECs may recover the costs assigned to that jurisdiction.