Application of 18 U.S.C. § 207(d) to Certain Employees in the Treasury Department [November 3, 2000] [open pdf - 23KB]
"The post-employment restrictions of 18 U.S.C. § 207(d), which cover officials paid 'at' the rate for level I of the Executive Schedule, do not apply to officials paid at a higher rate. Those officials are instead subject to the restrictions of 18 U.S.C. § 207(c)."
U.S. Dept. of Justice: http://www.justice.gov/