Section 146a
[Rejection of Defence Counsel of the Accused’s Own Choice]
(1) Where a person has been chosen as defence counsel although the prerequisites of Section 137 subsection (1), second sentence, or of Section 146 have been fulfilled, he shall be rejected as defence counsel as soon as this becomes evident; the same shall apply if the prerequisites of Section 146 are fulfilled after he has been chosen. If, in the cases referred to in Section 137 subsection (1), second sentence, more than one defence counsel give notification of their mandate, and if this means that the maximum number of counsel has been exceeded, they shall all be rejected. The decision to reject shall be taken by the court before which the proceedings are pending or which would be competent to hear the main proceedings.
(2) Acts of defence counsel prior to his rejection shall not be ineffective merely because the prerequisites of Section 137 subsection (1), second sentence, or of Section 146, have been fulfilled.