Opinion of Advocate General Campos Sánchez-Bordona delivered on 22 October 2020.#European Commission v Republic of Austria.#Failure of a Member State to fulfil obligations – Directive 2004/18/EC – Public works contracts – Contract between a public body and a private undertaking for the lease of building not yet constructed – Article 1 – Realisation of a work corresponding to requirements specified by the tenant – Article 16