Petition under section 141: Electronic filing and affidavit standards required, with service and joinder provisions. Rule 6C requires petitions under section 141 to be prepared in Form 1 with Form 24AAA and filed electronically to the Regional Director, with service on respondents and evidence of service. The Regional Director may allow joinder of multiple petitioners with a common interest. Every petition must be accompanied by a first person affidavit sworn before the authority under section 558 stating the deponent's full particulars; if the deponent is unknown to the attesting officer, identification is required. Affidavits must distinguish statements made from knowledge, information, belief or legal advice and, where based on received information, must name and give the address of the information source and state whether the deponent believes it to be true.