43 U.S.C. § 1355
No full-time officer or employee of the Department of the Interior who directly or indirectly discharged duties or responsibilities under this subchapter, and who was at any time during the twelve months preceding the termination of his employment with the Department compensated under the Executive Schedule or compensated at or above the annual rate of basic pay for grade GS–16 of the General Schedule shall—
(1) within two years after his employment with the Department has ceased—
any department, agency, or court of the United States, or any officer or employee thereof, in connection with any judicial or other proceeding, application, request for a ruling or other determination, regulation, order, lease, permit, rulemaking, or other particular matter involving a specific party or parties in which the United States is a party or has a direct and substantial interest which was actually pending under his official responsibility as an officer or employee within a period of one year prior to the termination of such responsibility or in which he participated personally and substantially as an officer or employee; or
(2) within one year after his employment with the Department has ceased—
the Department of the Interior, or any officer or employee thereof, in connection with any judicial, rulemaking, regulation, order, lease, permit, regulation, or other particular matter which is pending before the Department of the Interior or in which the Department has a direct and substantial interest.
(Aug. 7, 1953, ch. 345, § 29, as added Pub. L. 95–372, title II, § 208, , 92 Stat. 668.)
The Executive Schedule, referred to in text, is set out in section 5311 et seq. of Title 5, Government Organization and Employees.
References in laws to the rates of pay for GS–16, 17, or 18, or to maximum rates of pay under the General Schedule, to be considered references to rates payable under specified sections of Title 5, Government Organization and Employees, see section 529 [title I, § 101(c)(1)] of Pub. L. 101–509, set out in a note under section 5376 of Title 5.