Sources? When I look at the law and their mandate, it sure looks like they can't. That's not part of their soft powers. They can excusively go after a very narrow band of criminal acts.
"Article 70 - Offences against the administration of justice
Offences against the administration of justice
[...]
(c) Corruptly influencing a witness, obstructing or interfering with the attendance or testimony of a witness, retaliating against a witness for giving testimony or destroying, tampering with or interfering with the collection of evidence;
(d) Impeding, intimidating or corruptly influencing an official of the Court for the purpose of forcing or persuading the official not to perform, or to perform improperly, his or her duties;
(e) Retaliating against an official of the Court on account of duties performed by that or another official;"
So I'd say 70 (e) covers the sanctions imposed on those court officials. They are clearly officials of the court, and the sanctions are clearly part of retaliation against them. Consequently it stands to reason that anyone who participates in their enforcement or drafting or really in any way can in principle be prosecuted.
"Article 70 - Offences against the administration of justice
Offences against the administration of justice
[...]
(c) Corruptly influencing a witness, obstructing or interfering with the attendance or testimony of a witness, retaliating against a witness for giving testimony or destroying, tampering with or interfering with the collection of evidence;
(d) Impeding, intimidating or corruptly influencing an official of the Court for the purpose of forcing or persuading the official not to perform, or to perform improperly, his or her duties;
(e) Retaliating against an official of the Court on account of duties performed by that or another official;"
So I'd say 70 (e) covers the sanctions imposed on those court officials. They are clearly officials of the court, and the sanctions are clearly part of retaliation against them. Consequently it stands to reason that anyone who participates in their enforcement or drafting or really in any way can in principle be prosecuted.