2. The State Parties to the Convention, in their respective territories, shall provide for punishment of any person who keeps, maintains or manages or knowingly finances or takes part in the financing of a place used for the purpose of trafficking and knowingly lets or rents a building or other place or any part thereof for the purpose of trafficking. 3. Any attempt or abetment to commit any crime mentioned in paras 1 and 2 above or their financing shall also be punishable. Article IV AGGRAVATING CIRCUMSTANCES 1. The State Parties to the Convention shall ensure that their courts having jurisdiction over the offences committed under this Convention, can take into account factual circumstances which make the commission of such offences particularly grave, viz. a) the involvement in the offences of an organized criminal group to which the offender belongs; b) the involvement of the offender in other international organized criminal activities; c) the use of violence or arms by the offender; d) the fact that the offender holds a public office and that the offence is committed in misuse of that office; e) the victimization or trafficking of children; f) the fact that the offence is committed in a custodial institution or in an educational institution or social facility or in their immediate vicinity or in other places to which children and students visit for educational, sports, social and cultural activities; g) previous conviction, particularly for similar offences, whether in a Member State or any other country. 57