1) Rule 93 requires you to swear under oath regarding certain matters which means that you will need to provide an affidavit. Here are those items:
"RULE 93. CERTAIN PLEAS TO BE VERIFIED A pleading setting up any of the following matters, unless the truth of such matters appear of record, shall be verified by affidavit. 1. That the plaintiff has not legal capacity to sue or that the defendant has not legal capacity to be sued. 2. That the plaintiff is not entitled to recover in the capacity in which he sues, or that the defendant is not liable in the capacity in which he is sued. 3. That there is another suit pending in this State between the same parties involving the same claim. 4. That there is a defect of parties, plaintiff or defendant. 5. A denial of partnership as alleged in any pleading as to any party to the suit. 6. That any party alleged in any pleading to be a corporation is not incorporated as alleged. 7. Denial of the execution by himself or by his authority of any instrument in writing, upon which any pleading is founded, in whole or in part and charged to have been executed by him or by his authority, and not alleged to be lost or destroyed. Where such instrument in writing is charged to have been executed by a person then deceased, the affidavit shall be sufficient if it states that the affiant has reason to believe and does believe that such instrument was not executed by the decedent or by his authority. In the absence of such a sworn plea, the instrument shall be received in evidence as fully proved. 8. A denial of the genuineness of the indorsement or assignment of a written instrument upon which suit is brought by an indorsee or assignee and in the absence of such a sworn plea, the indorsement or assignment thereof shall be held as fully proved. The denial required by this subdivision of the rule may be made upon information and belief. 9. That a written instrument upon which a pleading is founded is without consideration, or that the consideration of the same has failed in whole or in part. 10. A denial of an account which is the foundation of the plaintiff's action, and supported by affidavit. 11. That a contract sued upon is usurious. Unless such plea is filed, no evidence of usurious interest as a defense shall be received. 12. That notice and proof of loss or claim for damage has not been given as alleged. Unless such plea is filed such notice and proof shall be presumed and no evidence to the contrary shall be admitted. A denial of such notice or such proof shall be made specifically and with particularity. 13. In the trial of any case appealed to the court from the Industrial Accident Board the following, if pleaded, shall be presumed to be true as pleaded and have been done and filed in legal time and manner, unless denied by verified pleadings: (a) Notice of injury. (b) Claim for Compensation. (c) Award of the Board. (d) Notice of intention not to abide by the award of the Board. (e) Filing of suit to set aside the award. (f) That the insurance company alleged to have been the carrier of the workers' compensation insurance at the time of the alleged injury was in fact the carrier thereof. (g) That there was good cause for not filing claim with the Industrial Accident Board within the one year period provided by statute. (h) Wage rate. A denial of any of the matters set forth in subdivisions (a) or (g) of paragraph 13 may be made on information and belief. Any such denial may be made in original or amended pleadings; but if in amended pleadings the same must be filed not less than seven days before the case proceeds to trial. In case of such denial the things so denied shall not be presumed to be true, and if essential to the case of the party alleging them, must be proved. 14. That a party plaintiff or defendant is not doing business under an assumed name or trade name as alleged. 15. In the trial of any case brought against an automobile insurance company by an insured under the provisions of an insurance policy in force providing protection against uninsured motorists, an allegation that the insured has complied with all the terms of the policy as a condition precedent to bringing the suit shall be presumed to be true unless denied by verified pleadings which may be upon information and belief. 16. Any other matter required by statute to be pleaded under oath."
Here is Rule 94:
RULE 94. AFFIRMATIVE DEFENSES In pleading to a preceding pleading, a party shall set forth affirmatively accord and satisfaction, arbitration and award, assumption of risk, contributory negligence, discharge in bankruptcy, duress, estoppel, failure of consideration, fraud, illegality, injury by fellow servant, laches, license, payment, release, res judicata, statute of frauds, statute of limitations, waiver, and any other matter constituting an avoidance or affirmative defense. Where the suit is on an insurance contract which insures against certain general hazards, but contains other provisions limiting such general liability, the party suing on such contract shall never be required to allege that the loss was not due to a risk or cause coming within any of the exceptions specified in the contract, nor shall the insurer be allowed to raise such issue unless it shall specifically allege that the loss was due to a risk or cause coming within a particular exception to the general liability; provided that nothing herein shall be construed to change the burden of proof on such issue as it now exists."
I'm uncertain regarding your last question.