529. Confessors, when delegated, can dispense as follows: (a) with ordinary faculties, from impediments, irregularities and penalties, as provided in Canons 1044, 1045, 985, 990, 2290; (b) with privileged faculties, from simple vows not reserved to the Pope, if no injury is done to the rights of a third party; and from occult irregularity produced by delinquency, that from homicide excepted. (In the internal sacramental forum the confessor can dispense from the impediments indicated in Canons 1043-1045.) 530. Priests that assist at marriages can dispense from impediments as provided in Canons 1043-1045. 531. The manner of seeking dispensations is as follows: (a) for the usual dispensations (e.g., those from fast, abstinence, observance of feasts, and the vows that may be dispensed by confessors) no particular procedure is required; (b) for the dispensation that must be sought from the Holy See, if the matter belongs to the internal forum, the petition is sent to the Sacred Penitentiary through the Confessor or Ordinary; if it belongs to the external forum, it is sent to the competent Congregation through the parish priest or Ordinary. Dispensation from public marriage impediments must be sent through the Ordinary. 532. The manner of preparing a petition for dispensation is as follows: (a) the name of the penitent must not be given in petitions to the Sacred Penitentiary, but the name and address of the party to whom the reply is to be sent should be clearly given; (b) the petition should be sent by letter. It may be written in any language, and should state the case with its circumstances, the favor that is asked, and the true reason for asking it. 533. A dispensation is invalidated as follows: (a) through defect of the petition, if it contains a substantial error, and the dispensation is given on condition of substantial truth (Canon 40); (b) through defect of the petitioner, if he is incapable of receiving the favor asked (Canon 46); (c) through defect of the dispensation, as when the requisite signature or seal is omitted; (d) through defect of the dispenser, as when he lacks jurisdiction, or grants without a just and proportionate reason a dispensation for which he has only delegated power (Canon 84). 534. If a dispensation is unjustly refused, note the following: (a) ordinarily, the subject has not the right to hold himself free from the law; (b) in extraordinary circumstances, when the law ceases, or no longer obliges (see 487 sqq.), the subject is free. 535. The faculty of dispensing should be interpreted as follows: (a) widely, when it was granted for cases in general (Canon 200, Sec.1); (b) strictly, when it is granted for a particular case (Canon 85).