Rule 302*(C)-*(D) - Attorneys - Appearances And Withdrawals*(c) Where counsel has entered an appearance, his representation of the defendant shall be effective until sentencing has been imposed.*(d) Where counsel files a formal application without having filed his written entry of appearance as required by subsection (a) of this Rule, he shall nevertheless be deemed to have entered his appearance, and may not withdraw from representing the defendant without complying with subsection (b) of this Rule.Buck. Cnty. Pa. 302*(C)-*(D)