Rule 1704 includes novelties in the form of complaint. Although the general pleading rule of the form of action in which relief is sought will apply, there are three special requirements.
The requirement of the "class action allegations" is fundamental. It impels the plaintiff to plead in detail all the facts which will support his right to this special remedy. It segregates these from the rest of the complaint and from the substantive averments of the plaintiff's cause of action. Most important of all, it permits the application of Rules 1705 and 1706, which exclude the use of preliminary objections to raise issues of fact with respect to the class action allegations, and requires such issues to be raised in the answer. Hopefully, this will reduce dilatory proceedings during the pleading stage.
231 Pa. Code app A r. 1704