What is the proper procedure for producing documents in a commercial suit?

Key Points: - Petitioner-defendant challenged orders allowing respondent-plaintiff to produce documents post-plaint filing under section 151 CPC and Order 7 Rule 14 CPC in a transferred commercial suit (!) (!) - Suit filed in 2015 for recovery of advertising charges was transferred to Commercial Court in 2020 under section 15 of Commercial Courts Act (!) (!) - Plaintiff sought permission for bills missed due to bona fide mistake via IA under section 151 CPC (2023) and later under Order 7 Rule 14 CPC, both allowed by Commercial Court (!) (!) (!) (!) - Commercial Courts Act requires plaint to include declaration that all relevant documents in plaintiff's possession have been disclosed, with verification via affidavit under Order VI Rule 15A (!) (!) (!) (!) - Defendant argued post-transfer production prohibited, especially after Statement of Truth and affidavits under Order 11 (!) (!) (!) - Court held procedural laws are subservient to substantial justice; violations allowed if no prejudice to opponent and due to bona fide mistake (!) (!) (!) (!) (!) - No prejudice to defendant as opportunity for cross-examination and rebuttal evidence remains (!) - Petition under Article 227 dismissed; impugned orders affirmed, with direction to decide pending IAs and suit expeditiously (!)

What is the proper procedure for producing documents in a commercial suit?