Tertiary decree: OPERAT attestation becomes mandatory on July 1, 2026

The annual OPERAT attestation is now enforceable for tertiary buildings over 1,000 m².

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The fact

This measure, stemming from the ELAN law, mandates gradual energy consumption reductions.

It follows a transitional period that began in 2025.

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Auto-synthesis from 1 media source · identified on July 16, 2026