What is it meant by 'extent' here in the last sentence?

--------------- Any of your data benefits from this full protection and will only be disclosed to third parties such as administrative or judicial authorities if the ACFS is compelled to do so pursuant to the applicable law, or if you have given your written consent to such disclosure. You may revoke such consent... show more ---------------
Any of your data benefits from this full protection and will only be disclosed to third parties such as administrative or judicial authorities if the ACFS is compelled to do so pursuant to the applicable law, or if you have given your written consent to such disclosure. You may revoke such consent or modify its *extent* at any time.
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