312. No objection made to the form or based upon the omission of any formality, even peremptory, shall be admitted in any action, suit or procedure respecting any matter contemplated in this act, unless a real injustice would result from the dismissal of such objection or when the omission of such formality entails nullity under an express provision of this act.
No person who has complied with a notice or informed himself sufficiently in any way regarding the content or object thereof shall subsequently invoke insufficiency or defect in the form of such notice, or the failure to publish or to serve the same.