Part one ORGANISATION OF COURTS
Chapter 9
PROCEDURAL OFFENCES, DEFAULT FINES AND CUSTODIAL ESCORT TO COURT
Section 3
A party in a civil case, or an aggrieved person in a criminal case, who endeavours to prolong the course of litigation by the interposition of clearly unfounded allegations or defences, by withholding evidence, or by any other improper measure, shall be sentenced to a fine. What has been said of a party shall also apply to an intervenor, even if the intervenor lacks standing as a party. (SFS 1991:241)
Section 4
The provisions in Sections 1 to 3 shall apply correspondingly to legal representatives, as well as to attorneys and counsel.
Offences against administration of justice
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
EDIT.