Sharon Sharpe Campbell-Allison, federal inmate # 03811-043, was convicted on her plea of guilty to a charge of conspiracy to possess cocaine with intent to distribute and was sentenced to 188 months of imprisonment and five years of supervised release. Campbell-Allison appeals the district court’s denial of her motion to compel the Government to move pursuant to Fed. R.Crim.P. 35(b) for a reduction of sentence based on her substantial assistance.

The district court construed Campbell-Allison’s motion as arising under Rule 35(b). A motion for reduction of a sentence pursuant to Rule 35(b) must be filed by the Government. United States v. Early, 27 F.3d 140, 141 (5th Cir. 1994). The Government’s refusal to move for a reduction of sentence is not renewable by the district court absent a “substantial threshold showing” that the decision is based on an unconstitutional motive. Wade v. United States, 504 U.S. 181, 185-86, 112 S.Ct. 1840, 118 L.Ed.2d 524 (1992). Campbell-Allison has not made such a showing.

Campbell-Allison’s motion was “unauthorized and without a jurisdictional basis.” United States v. Early, 27 F.3d 140, 141 (5th Cir. 1994). Accordingly, the judgment of the district court is AFFIRMED.