RULE 3.7. LAWYER AS WITNESS.

(a) A lawyer shall not act as advocate at a trial in which the lawyer is likely to be a necessary witness unless:
    (1) the testimony relates to an uncontested issue;
    (2) the testimony relates to the nature and value of legal services rendered in the case; or
    (3) disqualification of the lawyer would work substantial hardship on the client.
    (b) Reserved.