<h1><span class="d-block text-primary">The Once Only Hub.</span>The Once-Only Hub. Buildingspan>Building the European data-<span class="d-block">space.</span></h1>
<p class="lead">The Once-Only Technical System will connect EU public authorities, so they can exchange official documents and data at the citizen’s request. It puts into practice the Once-Only Principle, which states that citizens should not be forced to provide information to authorities if another authority already holds that information in electronic format.</p>
| 