(1) Whosoever upon an invitation to tender in relation to goods or commercial services makes an offer based on an unlawful agreement whose purpose is to cause the organiser to accept a particular offer shall be liable to imprisonment not exceeding five years or a fine.

(2) The private award of a contract after previous participation in a competition shall be equivalent to an invitation to tender within the meaning of subsection (1) above.

(3) Whosoever voluntarily prevents the organiser from accepting the offer or from providing his service shall not be liable under subsection (1), also in conjunction with subsection (2) above. If the offer is not accepted or the service of the organiser not provided regardless of the contribution of the offender he shall be exempt from liability if he voluntarily and earnestly makes efforts to prevent the acceptance of the offer or the provision of the service.