In most courts, the Court Clerk's Office would be that place. Numbering of paragraphs. As the wording of each decision is finalized before its issuance, paragraph numbers should be added. The court employee preparing the final version of the opinion would be the logical person to add the paragraph numbers. Final form of decisions.
Some courts change opinions after issuance.
The most explicit way to handle this practice is to publish a disclaimer, preferably at the heading of any opinion not yet in final form, stating that it is subject to change. This puts the reader on notice. Other places to publish such a notice are in advance sheets, or on the home page where the opinions are posted.