To direct the Secretary of Transportation to prohibit the commercial operation of supersonic transport category aircraft that do not comply with stage 3 noise levels if the European Union adopts certain aircraft noise regulations.

Cost and committee reports

Official records Congress.gov attaches to H.R. 661.

• CBO cost estimateThe Congressional Budget Office published “H.R. 661, A bill to direct the Secretary of Transportation to prohibit the commercial operation of supersoninc transport category aircraft that do not comply with stage 3 noise levels if the European Union adopts certain aircraft noise regulations” on February 25, 1999. CBO’s description reads “Cost estimate for the bill as ordered reported by the House Committee on Transportation and Infrastructure on February 11, 1999”.
  Read the CBO estimate ↗Source: Congressional Budget Office, February 25, 1999 ↗

  Evidence

  Field in the Congress.gov record

  cboCostEstimates

  CBO publication

  https://www.cbo.gov/publication/11389

  CBO publication date

  February 25, 1999

  Congress.gov bill record

  H.R. 661, 106th Congress

  Congress.gov API record

  https://api.congress.gov/v3/bill/106/hr/661

  Record last updated by Congress.gov

  September 8, 2026

  PORKER copy retrieved

  September 14, 2026

  Stored copy, SHA-256 of the file

  1725da8e4bef1e3906f088749b65df42daac86c9ee86b82ac6615231345fae9b

• PORKER links to the estimate and does not repeat its dollar figures. Each estimate is for the version of the bill its description names; the bill may have changed since.

• Committee reportCongress.gov lists 1 committee report for this bill: H. Rept. 106-35 ↗. The Congress.gov committee record lists a “Reported By” entry for the Transportation and Infrastructure Committee on March 2, 1999.
  Source: Congress.gov, reported March 2, 1999 ↗

  Evidence

  Field in the Congress.gov record

  committeeReports

  Report API records

  https://api.congress.gov/v3/committee-report/106/HRPT/35

  Congress.gov bill record

  H.R. 661, 106th Congress

  Congress.gov API record

  https://api.congress.gov/v3/bill/106/hr/661

  Record last updated by Congress.gov

  September 8, 2026

  PORKER copy retrieved

  September 14, 2026

  Stored copy, SHA-256 of the file

  1725da8e4bef1e3906f088749b65df42daac86c9ee86b82ac6615231345fae9b

  A committee report is the committee’s own explanation of the bill. PORKER lists it and links to it; reading it is up to you.

From the Congress.gov bill record for H.R. 661, last updated September 8, 2026. PORKER’s copy was retrieved September 14, 2026 and is refreshed nightly. Open “Evidence” on any line for the record, field and file fingerprint.