Which of the following clauses should not be considered to be influence in light of article 18bis of the RSTP? Select one or more: a. A clause foreseeing the obligation to enter the transfer in a timely manner in TMS b. A clause stipulating a sell-on fee without any further conditions c. A clause prohibiting the transfer of a player to a direct competitor of the counter club d. A clause prohibiting the transfer of a player without the consent of the counter club