(a) Who may contest petition. The debtor named in an involuntary petition may contest the petition. In the case of a petition against a partnership under Rule 1004, a nonpetitioning general partner, or a person who is alleged to be a general partner but denies the allegation, may contest the petition.
(b) Defenses and objections; when presented. Defenses and objections to the petition shall be presented in the manner prescribed by Rule 12 F.R.Civ.P. and shall be filed and served within 21 days after service of the summons, except that if service is made by publication on a party or partner not residing or found within the state in which the court sits, the court shall prescribe the time for filing and serving the response.
(d) Claims against petitioners. A claim against a petitioning creditor may not be asserted in the answer except for the purpose of defeating the petition.
(e) Other pleadings. No other pleadings shall be permitted, except that the court may order a reply to an answer and prescribe the time for filing and service.
(f) Corporate ownership statement. If the entity responding to the involuntary petition is a corporation, the entity shall file with its first appearance, pleading, motion, response, or other request addressed to the court a corporate ownership statement containing the information described in Rule 7007.1.