; and (2) shall not be made available by any Federal, State, political subdivision or tribal authority pursuant to any Federal, State, political subdivision, or tribal law requiring public disclosure of information or records. 4. Electricity interruption information (a) Interruption cost estimate calculator The Secretary of Energy, in consultation with the Federal Energy Regulatory Commission, State regulatory authorities, industry stakeholders, and other Federal agencies the Secretary determines appropriate, shall update the Interruption Cost Estimate Calculator, as often as appropriate and feasible, but not less than once every 2 years. (b) Indices The Secretary of Energy, in consultation with the Federal Energy Regulatory Commission, State regulatory authorities, industry stakeholders, and other Federal agencies the Secretary determines appropriate, shall, as often as appropriate and feasible, update the following: (1) The System Average Interruption Duration Index. (2) The System Average Interruption Frequency Index. (3) The Customer Average Interruption Duration Index. (c) Survey The Administrator of the Energy Information Administration shall collect information on electricity interruption costs, if available, from a representative sample of owners of electric grid assets through a biennial survey. 5. Definitions In the Act, the following definitions apply: (1) Electric utility The term electric utility has the meaning given such term in section 3 of the Federal Power Act ( 16 U.S.C. 796 ). (2) State regulatory authority The term State regulatory authority has the meaning given such term in section 3 of the Federal Power Act ( 16 U.S.C. 796 ).