Hi,
You can create a custom field for that.
A custom item field with the type "checkbox", and required, then add only one value, something like: "PRODUCT_T_C".
Then in the product edition page, fill the url of the desired article for the terms and conditions, add a translation override like:
PRODUCT_T_C="<a href='%s'>Terms and conditions for this product.</a>"
Create too another custom field, a product field this time, to specify a different link for each products.
You can name it for example, "tclink".
Finally do a view override on the view "product / show_block_custom_item" and if "$oneExtraField->field_namekey" is equal to your custom field namekey, so replace the text by "JTex::sprintf('PRODUCT_T_C',$this->elements->tclink);"