The SOA Attestation is the mandatory certification for participation in tenders for the execution of public works contracts, or a document necessary and sufficient to prove, during the tender, the company's ability to execute, directly or in subcontracting, public works of works with an auction base amount exceeding € 150,000.00; it certifies and guarantees that the company in the construction sector possesses all the requisites envisaged by the current legislation in the field of Public Works Contracts.