Actually it's a Notice of Appearance a Notice of Representation is for a partial representation.
(e) Appearance of Attorney. An attorney may appear in a proceeding in any of the following ways:
(1) By serving and filing, on behalf of a party, the partys first pleading or paper in the proceeding.
(2) By substitution of counsel, but only by order of court and with written consent of the client, filed with the court. The court may condition substitution upon payment of, or security for, the substituted attorneys fees and expenses, or upon such other terms as may be just.
(3) By filing with the court and serving upon all parties a notice of appearance as counsel for a party that has already appeared in a proceeding pro se or as co-counsel for a party that has already appeared in a proceeding by non-withdrawing counsel.
http://www.joffelaw.com/state-rules/2-505.html