(if any) meaning in legal context

meaning-in-context legalese

Solution 1:

If any is being used as an ellipsis of If there are any. It's saying the Registrar must make variations if there are any variations, but it's entirely possible that there are not any variations to make.

Solution 2:

If there are variations, the Registrar must make the variations to the particulars entered in the Child Support Register.

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