Article 21 empowers the President of the Authority to protect state revenue when tax collection is at risk. By obtaining an order from a judge of urgent matters, the Authority can impose a precautionary seizure on a taxpayer's assets, whether held by the taxpayer or a third party. Once notified, the taxpayer is prohibited from disposing of these assets. This measure serves as a safeguard against asset dissipation during an investigation or before a final assessment. Taxpayers and interested parties have thirty days to appeal the seizure order before a competent court to ensure judicial oversight.