the plan under section 101(f). (15) The information contained on the most recent annual return under section 6058 of the Internal Revenue Code of 1986 and actuarial report under section 6059 of such Code of the plan. (16) Copies of the plan document and amendments, other retirement benefit or ancillary benefit plans relating to the plan and contribution obligations under such plans, a breakdown of administrative expenses of the plan, participant census data and distribution of benefits, the most recent actuarial valuation report as of the plan year, financial reports, and copies of the portions of collective bargaining agreements relating to plan contributions, funding coverage, or benefits, and such other information as the corporation may reasonably require. Any information disclosed by a plan to the corporation that could identify individual employers shall be confidential and not subject to publication or disclosure. (n) Report to Congress (1) In general Not later than 1 year after the date of enactment of this section and annually thereafter, the board of directors of the corporation shall submit to the Committee on Health, Education, Labor, and Pensions and the Committee on Finance of the Senate and the Committee on Education and Labor and the Committee on Ways and Means of the House of Representatives a detailed report on the implementation and administration of this section. Such report shall include— (A) information on the name and number of multiemployer plans that have applied for partition assistance under this section