What is the limitation of a motion under section 2255 of the Criminal Code to challenge a federal conviction and sentence?

"A petitioner is generally limited to one motion under 2255, and may not bring a 'second or successive motion' unless it meets the exacting standards of 28 U.S.C. 2255(h)." United States v. Washington, 653 F.3d 1057, 1059 (9th Cir. 2011). That section, in turn, provides:

28 U.S.C. 2255(h).

"Under the statute of limitations applicable to a 2255 motion challenging a federal conviction and sentence, 28 U.S.C. 2255(f), a defendant has one year to file such a motion, measured from the latest of four possible dates." United States v. Blackstone, 903 F.3d 1020, 1024 (9th Cir. 2018), cert. denied, No. 18-9368, 2019 WL 2211790 (U.S. June 24, 2019). The

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