When it comes to product variations, you can choose between two different ways to apply the general rules and override them from the variation settings.
This can be controlled using the option Enable uploads for products variations in the tab General.
If it is disabled, the general rules will not apply to product variations, but you can, however, enable them from the variation details, as you can see in the following screenshot:
If it is enabled, the general rules will automatically apply to all product variations, but you can disable them from the variation details as shown below:
If you want to create custom rules for the product variations of a specific product, you can add them through the Add new rule button and save the product.
Now, the general rules will no longer apply to product variations, but you can enable/disable them on every variation.
