Endangered Species Listing and Delisting Process Reform Act of 1999

[AI summary unavailable — showing source text] Endangered Species Listing and Delisting Process Reform Act of 1999 - Amends the Endangered Species Act of 1973 to direct the Secretary of the Interior, when required under such Act to use the best scientific and commercial data available in the determination of a species for inclusion on the endangered or threatened list, to use data that is empirical or has been field-tested or peer-reviewed. Allows the Secretary to make such a determination only if there is sufficient biological information to support recovery planning for the species. Adds certain information required in a petition to add a species to the endangered or threatened list, including documentation of the species, a description of its range, and an appraisal of its status and threats. Requires the Secretary to notify and provide a copy of such petition to the State agency of each State in which the species is believed to occur and to solicit the assessment of such agency as to whether the petitioned action is warranted. Provides authorized actions by the Secretary when considering adding a species to such lists when no petition has been received. Requires the consideration of appropriate State assessments before fina…