Article 17: Attempt to Commit the Offence or Participation
(1). A person who attempts to commit the offences mentioned in Articles (9 – 16) of this Law, or is an accomplice in committing these offences, with consideration of circumstances, he/she shall be sentenced to the same punishment prescribed for the perpetrator of the offence.
(2). The provisions of this Law are not applicable concerning the attempt to threaten the commission of any offences mentioned in Articles (9 – 16) of this Law.
Article 18: Unity
A person who unites with another person in order to participate in the commission of offences mentioned in Articles (9 – 16) of this Law or incites or encourages others for the commission of these offences or plans, organizes for the commission of these offences, with consideration of circumstances, he/she shall be sentenced to long term imprisonment of not less than ten years or continuous imprisonment.
Article 19: Supporting or Service to the Offence
(1). A person who obtains the membership of a terrorist organization, shall be sentenced to medium term imprisonment.
(2). A person who recruits another person in order to participates in or carry out the commission of offences mentioned in Articles (9 – 18) of this Law, the recruiter shall be sentenced to the punishment prescribed for the perpetrator of the offence.
(3). A person who helped in any forms or ways in order to complete the commission of offences mentioned in Paragraph (1) of this Article with intention to support it, including the provision of service and weapon used in the commission of the mentioned offences, shall be sentenced to the same punishment prescribed for the perpetrator of the offence.
Article 20: Creating Obstacle or Disruption
A person who creates obstacles or disrupts the process of discovery and investigation of terrorist offences or the trial of offenders, or destroys the incriminating evidence and grounded reasons through false testimony, bribing, intimidation, exertion of influence or any other forms or ways, shall be sentenced to long term imprisonment.
Please note that this is an unofficial translation by UNODC based on the final text in Dari provided by Taqnin - the Department of Legislative Drafting of the Ministry of Justice of Afghanistan.