(b) Service of complaint where summons served without complaint. If the complaint is not served with the summons, the defendant may serve a written demand for the complaint within the time provided in subdivision (a) of rule 320 for an appearance. Service of the complaint shall be made within twenty days after service of the demand. Service of the demand shall extend the time to appear until twenty days after service of the complaint. If no demand is made, the complaint shall be served within twenty days after service of the notice of appearance. The court upon motion may dismiss the action if service of the complaint is not made as provided in this subdivision. A demand or motion under this subdivision does not of itself constitute an appearance in the action.

(c) Additional time to serve answer where summons and complaint not personally delivered to person to be served within the state. If the complaint is served with the summons and the service is made on the defendant by delivering the summons and complaint to an official of the state authorized to receive service in his behalf or if service of the summons and complaint is made pursuant to section 303, paragraphs two, three, four or five of section 308, or sections 313, 314 or 315, service of an answer shall be made within thirty days after service is complete.

(d) Extension of time to appear or plead. Upon the application of a party, the court may extend the time to appear or plead, or compel the acceptance of a pleading untimely served, upon such terms as may be just and upon a showing of reasonable excuse for delay or default.