There are no such rules. However, it has been mentioned in the BIS Standards Formulation Manual.
Mexico 18:
In Paragraph 102, paragraph ix) Standards and Technical Regulations, Indian Standards are formulated according to the procedures established in the BIS Rules 1987. The Technical Committee discusses the preliminary draft standard developed by expert bodies (usually members of the committee). When a technical committee approves the draft, it is distributed to stakeholders and posted on the BIS website for comments to be submitted within two months. The technical committee finalizes the draft standard by taking into account the comments received. The adopted standard its revisions, amendments and repeals are published in the Official Gazette.
Qn. Are the draft standards are also published in the Official Gazette?