Where the market surveillance authorities F2... have taken action pursuant to Article 20 of F3RAMS or where they have sufficient reason to believe that a construction product covered by a F4designated standard or for which a F5UK Technical Assessment has been issued does not achieve the declared performance and presents a risk for the fulfilment of the basic requirements for construction works covered by this Regulation, they shall carry out an evaluation in relation to the product concerned covering the respective requirements laid down by this Regulation. The relevant economic operators shall cooperate as necessary with the market surveillance authorities.

Where, in the course of that evaluation, the market surveillance authorities find that the construction product does not comply with the requirements laid down in this Regulation, they shall without delay require the relevant economic operator to take all appropriate corrective actions to bring the product into compliance with those requirements, notably with the declared performance, or to withdraw the product from the market, or recall it within a reasonable period, commensurate with the nature of the risk, as they may prescribe.

The market surveillance authorities shall inform the F6approved body accordingly, if F7an approved body is involved.

Article 21 of F8RAMS shall apply to the measures referred to in the second subparagraph of this paragraph.

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Where the relevant economic operator, within the period referred to in the second subparagraph of paragraph 1, does not take adequate corrective action, the market surveillance authorities shall take all appropriate F10... measures to prohibit or restrict the making available of the construction product on the F10... market or to withdraw the construction product from that market or to recall it.

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